diff --git a/ShadowedRealmsMobile/src/server/ShadowedRealms.Admin/Models/ErrorViewModel.cs b/ShadowedRealmsMobile/src/server/ShadowedRealms.Admin/Models/ErrorViewModel.cs
new file mode 100644
index 0000000..deb02f2
--- /dev/null
+++ b/ShadowedRealmsMobile/src/server/ShadowedRealms.Admin/Models/ErrorViewModel.cs
@@ -0,0 +1,51 @@
+/*
+ * File: D:\shadowed-realms-mobile\ShadowedRealmsMobile\src\server\ShadowedRealms.Admin\Models\ErrorViewModel.cs
+ * Created: 2025-10-23
+ * Last Modified: 2025-10-23
+ * Description: Error view model for Admin project error handling and display
+ * Last Edit Notes: Individual file implementation for ASP.NET Core MVC error handling in Admin dashboard
+ */
+
+namespace ShadowedRealms.Admin.Models
+{
+    /// <summary>
+    /// View model for displaying error information in the Admin project
+    /// </summary>
+    public class ErrorViewModel
+    {
+        /// <summary>
+        /// Unique identifier for the current request
+        /// </summary>
+        public string? RequestId { get; set; }
+
+        /// <summary>
+        /// Whether to show the request ID on the error page
+        /// </summary>
+        public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
+
+        /// <summary>
+        /// Error message to display to the user
+        /// </summary>
+        public string? ErrorMessage { get; set; }
+
+        /// <summary>
+        /// HTTP status code for the error
+        /// </summary>
+        public int StatusCode { get; set; } = 500;
+
+        /// <summary>
+        /// Detailed error information (only shown in development)
+        /// </summary>
+        public string? DetailedError { get; set; }
+
+        /// <summary>
+        /// When the error occurred
+        /// </summary>
+        public DateTime ErrorTime { get; set; } = DateTime.UtcNow;
+
+        /// <summary>
+        /// Whether this error should be logged
+        /// </summary>
+        public bool ShouldLog { get; set; } = true;
+    }
+}
\ No newline at end of file
diff --git a/ShadowedRealmsMobile/src/server/ShadowedRealms.Admin/ShadowedRealms.Admin.csproj b/ShadowedRealmsMobile/src/server/ShadowedRealms.Admin/ShadowedRealms.Admin.csproj
index 7a330ba..0c6df40 100644
--- a/ShadowedRealmsMobile/src/server/ShadowedRealms.Admin/ShadowedRealms.Admin.csproj
+++ b/ShadowedRealmsMobile/src/server/ShadowedRealms.Admin/ShadowedRealms.Admin.csproj
@@ -17,7 +17,6 @@
 
   <ItemGroup>
     <Folder Include="Controllers\" />
-    <Folder Include="Models\" />
     <Folder Include="Extensions\" />
     <Folder Include="Filters\" />
     <Folder Include="ViewModels\" />
diff --git a/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Alliance/BuildingConstructionRequestDto.cs b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Alliance/BuildingConstructionRequestDto.cs
new file mode 100644
index 0000000..e472994
--- /dev/null
+++ b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Alliance/BuildingConstructionRequestDto.cs
@@ -0,0 +1,53 @@
+/*
+ * File: D:\shadowed-realms-mobile\ShadowedRealmsMobile\src\server\ShadowedRealms.Shared\DTOs\Alliance\BuildingConstructionRequestDto.cs
+ * Created: 2025-10-22
+ * Last Modified: 2025-10-22
+ * Description: Request DTO for alliance building construction operations
+ * Last Edit Notes: Initial creation following established Alliance DTO patterns
+ */
+
+using System.ComponentModel.DataAnnotations;
+
+namespace ShadowedRealms.Shared.DTOs.Alliance
+{
+    /// <summary>
+    /// Request DTO for alliance building construction operations
+    /// </summary>
+    public class BuildingConstructionRequestDto
+    {
+        /// <summary>
+        /// Type of building to construct
+        /// </summary>
+        [Required]
+        [StringLength(100)]
+        public string BuildingType { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Target level for construction
+        /// </summary>
+        [Required]
+        [Range(1, 50)]
+        public int TargetLevel { get; set; }
+
+        /// <summary>
+        /// Initial resource contribution
+        /// </summary>
+        public Dictionary<string, decimal> ResourceContribution { get; set; } = new();
+
+        /// <summary>
+        /// Priority level for this construction (1-5)
+        /// </summary>
+        [Range(1, 5)]
+        public int Priority { get; set; } = 3;
+
+        /// <summary>
+        /// Whether to use alliance treasury funds
+        /// </summary>
+        public bool UseTreasuryFunds { get; set; } = false;
+
+        /// <summary>
+        /// Construction parameters and options
+        /// </summary>
+        public Dictionary<string, object>? ConstructionParameters { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Alliance/BuildingConstructionResponseDto.cs b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Alliance/BuildingConstructionResponseDto.cs
index e472994..d7df74b 100644
--- a/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Alliance/BuildingConstructionResponseDto.cs
+++ b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Alliance/BuildingConstructionResponseDto.cs
@@ -1,53 +1,86 @@
 /*
- * File: D:\shadowed-realms-mobile\ShadowedRealmsMobile\src\server\ShadowedRealms.Shared\DTOs\Alliance\BuildingConstructionRequestDto.cs
- * Created: 2025-10-22
- * Last Modified: 2025-10-22
- * Description: Request DTO for alliance building construction operations
- * Last Edit Notes: Initial creation following established Alliance DTO patterns
+ * File: D:\shadowed-realms-mobile\ShadowedRealmsMobile\src\server\ShadowedRealms.Shared\DTOs\Alliance\BuildingConstructionResponseDto.cs
+ * Created: 2025-10-23
+ * Last Modified: 2025-10-23
+ * Description: Response DTO for alliance building construction results
+ * Last Edit Notes: Individual file implementation for building construction results with resource tracking and timeline management
  */
 
-using System.ComponentModel.DataAnnotations;
-
 namespace ShadowedRealms.Shared.DTOs.Alliance
 {
     /// <summary>
-    /// Request DTO for alliance building construction operations
+    /// Response DTO for alliance building construction results
     /// </summary>
-    public class BuildingConstructionRequestDto
+    public class BuildingConstructionResponseDto
     {
         /// <summary>
-        /// Type of building to construct
+        /// Alliance performing the construction
+        /// </summary>
+        public int AllianceId { get; set; }
+
+        /// <summary>
+        /// Type of building being constructed
         /// </summary>
-        [Required]
-        [StringLength(100)]
         public string BuildingType { get; set; } = string.Empty;
 
+        /// <summary>
+        /// Current building level
+        /// </summary>
+        public int CurrentLevel { get; set; }
+
         /// <summary>
         /// Target level for construction
         /// </summary>
-        [Required]
-        [Range(1, 50)]
         public int TargetLevel { get; set; }
 
         /// <summary>
-        /// Initial resource contribution
+        /// Whether construction was successfully initiated
         /// </summary>
-        public Dictionary<string, decimal> ResourceContribution { get; set; } = new();
+        public bool ConstructionStarted { get; set; }
 
         /// <summary>
-        /// Priority level for this construction (1-5)
+        /// Total resources required for construction
         /// </summary>
-        [Range(1, 5)]
-        public int Priority { get; set; } = 3;
+        public Dictionary<string, decimal> RequiredResources { get; set; } = new();
 
         /// <summary>
-        /// Whether to use alliance treasury funds
+        /// Resources contributed so far
         /// </summary>
-        public bool UseTreasuryFunds { get; set; } = false;
+        public Dictionary<string, decimal> ContributedResources { get; set; } = new();
 
         /// <summary>
-        /// Construction parameters and options
+        /// Member contributions to construction
         /// </summary>
-        public Dictionary<string, object>? ConstructionParameters { get; set; }
+        public Dictionary<string, object> MemberContributions { get; set; } = new();
+
+        /// <summary>
+        /// Estimated completion time
+        /// </summary>
+        public DateTime? EstimatedCompletion { get; set; }
+
+        /// <summary>
+        /// Construction progress percentage
+        /// </summary>
+        public decimal ProgressPercentage { get; set; }
+
+        /// <summary>
+        /// Benefits unlocked at current level
+        /// </summary>
+        public List<string> CurrentBenefits { get; set; } = new();
+
+        /// <summary>
+        /// Benefits that will be unlocked at target level
+        /// </summary>
+        public List<string> UpcomingBenefits { get; set; } = new();
+
+        /// <summary>
+        /// When construction was initiated or last updated
+        /// </summary>
+        public DateTime UpdatedAt { get; set; }
+
+        /// <summary>
+        /// Additional construction details
+        /// </summary>
+        public Dictionary<string, object>? ConstructionDetails { get; set; }
     }
 }
\ No newline at end of file
diff --git a/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Player/CombatPreparationRequestDto.cs b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Player/CombatPreparationRequestDto.cs
new file mode 100644
index 0000000..a0b22f6
--- /dev/null
+++ b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Player/CombatPreparationRequestDto.cs
@@ -0,0 +1,73 @@
+/*
+ * File: D:\shadowed-realms-mobile\ShadowedRealmsMobile\src\server\ShadowedRealms.Shared\DTOs\Player\CombatPreparationRequestDto.cs
+ * Created: 2025-10-23
+ * Last Modified: 2025-10-23
+ * Description: Request DTO for player combat preparation operations
+ * Last Edit Notes: Individual file implementation for combat preparation with dragon integration and field interception support
+ */
+
+using System.ComponentModel.DataAnnotations;
+
+namespace ShadowedRealms.Shared.DTOs.Player
+{
+    /// <summary>
+    /// Request DTO for player combat preparation operations
+    /// </summary>
+    public class CombatPreparationRequestDto
+    {
+        /// <summary>
+        /// Type of combat being prepared for (attack, defense, march, intercept)
+        /// </summary>
+        [Required]
+        [StringLength(50)]
+        public string CombatType { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Target player or location for combat
+        /// </summary>
+        [StringLength(100)]
+        public string? Target { get; set; }
+
+        /// <summary>
+        /// Army composition for combat
+        /// </summary>
+        public Dictionary<string, int> ArmyComposition { get; set; } = new();
+
+        /// <summary>
+        /// Dragon to include in combat
+        /// </summary>
+        [StringLength(100)]
+        public string? DragonId { get; set; }
+
+        /// <summary>
+        /// Equipment to be used in combat
+        /// </summary>
+        public List<string> Equipment { get; set; } = new();
+
+        /// <summary>
+        /// Combat buffs to apply
+        /// </summary>
+        public List<string> CombatBuffs { get; set; } = new();
+
+        /// <summary>
+        /// Whether to include field interception calculations
+        /// </summary>
+        public bool IncludeInterceptionCalculations { get; set; } = false;
+
+        /// <summary>
+        /// March speed preferences
+        /// </summary>
+        [Range(1, 10)]
+        public int SpeedSetting { get; set; } = 5;
+
+        /// <summary>
+        /// Whether to validate resource costs
+        /// </summary>
+        public bool ValidateResourceCosts { get; set; } = true;
+
+        /// <summary>
+        /// Additional preparation parameters
+        /// </summary>
+        public Dictionary<string, object>? PreparationParameters { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/CompetitiveEffectivenessResponseDto.cs b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/CompetitiveEffectivenessResponseDto.cs
new file mode 100644
index 0000000..a41a6f9
--- /dev/null
+++ b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/CompetitiveEffectivenessResponseDto.cs
@@ -0,0 +1,86 @@
+/*
+ * File: D:\shadowed-realms-mobile\ShadowedRealmsMobile\src\server\ShadowedRealms.Shared\DTOs\Purchase\CompetitiveEffectivenessResponseDto.cs
+ * Created: 2025-10-23
+ * Last Modified: 2025-10-23
+ * Description: Response DTO for competitive effectiveness analysis
+ * Last Edit Notes: Individual file implementation for anti-pay-to-win effectiveness monitoring ensuring 70% F2P competitive viability
+ */
+
+namespace ShadowedRealms.Shared.DTOs.Purchase
+{
+    /// <summary>
+    /// Response DTO for competitive effectiveness analysis
+    /// </summary>
+    public class CompetitiveEffectivenessResponseDto
+    {
+        /// <summary>
+        /// Player being analyzed for competitive effectiveness
+        /// </summary>
+        public int PlayerId { get; set; }
+
+        /// <summary>
+        /// Player's current competitive effectiveness percentage
+        /// </summary>
+        public decimal CurrentEffectiveness { get; set; }
+
+        /// <summary>
+        /// Effectiveness from spending vs skill breakdown
+        /// </summary>
+        public Dictionary<string, decimal> EffectivenessBreakdown { get; set; } = new();
+
+        /// <summary>
+        /// How player compares to other players in kingdom
+        /// </summary>
+        public Dictionary<string, object> KingdomComparison { get; set; } = new();
+
+        /// <summary>
+        /// Effectiveness by combat category
+        /// </summary>
+        public Dictionary<string, decimal> CombatEffectiveness { get; set; } = new();
+
+        /// <summary>
+        /// Economic and resource effectiveness
+        /// </summary>
+        public Dictionary<string, decimal> EconomicEffectiveness { get; set; } = new();
+
+        /// <summary>
+        /// Social and alliance effectiveness
+        /// </summary>
+        public Dictionary<string, decimal> SocialEffectiveness { get; set; } = new();
+
+        /// <summary>
+        /// Areas where player can improve through skill
+        /// </summary>
+        public List<Dictionary<string, object>> SkillImprovementAreas { get; set; } = new();
+
+        /// <summary>
+        /// Recommended actions to maintain competitive balance
+        /// </summary>
+        public List<string> BalanceRecommendations { get; set; } = new();
+
+        /// <summary>
+        /// Whether player is within healthy competitive range (60-70% for F2P)
+        /// </summary>
+        public bool IsWithinHealthyRange { get; set; }
+
+        /// <summary>
+        /// Projected effectiveness with recommended improvements
+        /// </summary>
+        public decimal ProjectedEffectiveness { get; set; }
+
+        /// <summary>
+        /// Time investment needed to reach projected effectiveness
+        /// </summary>
+        public Dictionary<string, object> TimeInvestmentRequired { get; set; } = new();
+
+        /// <summary>
+        /// When effectiveness was calculated
+        /// </summary>
+        public DateTime CalculatedAt { get; set; }
+
+        /// <summary>
+        /// Additional effectiveness analysis details
+        /// </summary>
+        public Dictionary<string, object>? EffectivenessDetails { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/FraudDetectionResponseDto.cs b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/FraudDetectionResponseDto.cs
new file mode 100644
index 0000000..e788d94
--- /dev/null
+++ b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/FraudDetectionResponseDto.cs
@@ -0,0 +1,76 @@
+/*
+ * File: D:\shadowed-realms-mobile\ShadowedRealmsMobile\src\server\ShadowedRealms.Shared\DTOs\Purchase\FraudDetectionResponseDto.cs
+ * Created: 2025-10-23
+ * Last Modified: 2025-10-23
+ * Description: Response DTO for fraud detection analysis results
+ * Last Edit Notes: Individual file implementation for comprehensive fraud detection results with risk scoring and recommendation system
+ */
+
+namespace ShadowedRealms.Shared.DTOs.Purchase
+{
+    /// <summary>
+    /// Response DTO for fraud detection analysis results
+    /// </summary>
+    public class FraudDetectionResponseDto
+    {
+        /// <summary>
+        /// Player being analyzed for fraud
+        /// </summary>
+        public int PlayerId { get; set; }
+
+        /// <summary>
+        /// Transaction analyzed for fraud indicators
+        /// </summary>
+        public string TransactionId { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Overall fraud risk score (0-100)
+        /// </summary>
+        public int FraudRiskScore { get; set; }
+
+        /// <summary>
+        /// Risk classification (Low, Medium, High, Critical)
+        /// </summary>
+        public string RiskLevel { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Whether transaction should be blocked
+        /// </summary>
+        public bool RecommendBlock { get; set; }
+
+        /// <summary>
+        /// Specific fraud indicators detected
+        /// </summary>
+        public List<string> FraudIndicators { get; set; } = new();
+
+        /// <summary>
+        /// Detailed fraud analysis results
+        /// </summary>
+        public Dictionary<string, object> FraudAnalysis { get; set; } = new();
+
+        /// <summary>
+        /// Historical pattern analysis results
+        /// </summary>
+        public Dictionary<string, object>? HistoricalPatterns { get; set; }
+
+        /// <summary>
+        /// Recommended actions based on analysis
+        /// </summary>
+        public List<string> RecommendedActions { get; set; } = new();
+
+        /// <summary>
+        /// Confidence level in the fraud assessment (0-100)
+        /// </summary>
+        public int ConfidenceLevel { get; set; }
+
+        /// <summary>
+        /// When fraud analysis was performed
+        /// </summary>
+        public DateTime AnalysisTime { get; set; }
+
+        /// <summary>
+        /// Additional fraud detection metadata
+        /// </summary>
+        public Dictionary<string, object>? FraudMetadata { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/MonetizationHealthResponseDto.cs b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/MonetizationHealthResponseDto.cs
new file mode 100644
index 0000000..a2b4779
--- /dev/null
+++ b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/MonetizationHealthResponseDto.cs
@@ -0,0 +1,96 @@
+/*
+ * File: D:\shadowed-realms-mobile\ShadowedRealmsMobile\src\server\ShadowedRealms.Shared\DTOs\Purchase\MonetizationHealthResponseDto.cs
+ * Created: 2025-10-23
+ * Last Modified: 2025-10-23
+ * Description: Response DTO for monetization health monitoring
+ * Last Edit Notes: Individual file implementation for ethical monetization health monitoring with player protection and spending limit analysis
+ */
+
+namespace ShadowedRealms.Shared.DTOs.Purchase
+{
+    /// <summary>
+    /// Response DTO for monetization health monitoring
+    /// </summary>
+    public class MonetizationHealthResponseDto
+    {
+        /// <summary>
+        /// Player being monitored for monetization health
+        /// </summary>
+        public int PlayerId { get; set; }
+
+        /// <summary>
+        /// Overall monetization health status (Healthy, Warning, Critical)
+        /// </summary>
+        public string HealthStatus { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Player's spending behavior classification
+        /// </summary>
+        public string SpendingBehaviorType { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Total spending amount over monitoring period
+        /// </summary>
+        public decimal TotalSpending { get; set; }
+
+        /// <summary>
+        /// Spending frequency analysis
+        /// </summary>
+        public Dictionary<string, object> SpendingFrequency { get; set; } = new();
+
+        /// <summary>
+        /// Spending pattern analysis and trends
+        /// </summary>
+        public Dictionary<string, object> SpendingPatterns { get; set; } = new();
+
+        /// <summary>
+        /// Player protection measures currently active
+        /// </summary>
+        public List<string> ActiveProtections { get; set; } = new();
+
+        /// <summary>
+        /// Recommended spending limits and controls
+        /// </summary>
+        public Dictionary<string, object> RecommendedLimits { get; set; } = new();
+
+        /// <summary>
+        /// Warning indicators for problematic spending
+        /// </summary>
+        public List<string> WarningIndicators { get; set; } = new();
+
+        /// <summary>
+        /// Positive engagement metrics (time played, social interactions)
+        /// </summary>
+        public Dictionary<string, object> PositiveEngagement { get; set; } = new();
+
+        /// <summary>
+        /// Value provided to player vs spending analysis
+        /// </summary>
+        public Dictionary<string, object> ValueAnalysis { get; set; } = new();
+
+        /// <summary>
+        /// Player satisfaction and retention indicators
+        /// </summary>
+        public Dictionary<string, object> SatisfactionMetrics { get; set; } = new();
+
+        /// <summary>
+        /// Ethical monetization compliance score (0-100)
+        /// </summary>
+        public int EthicalComplianceScore { get; set; }
+
+        /// <summary>
+        /// Recommended actions for maintaining healthy monetization
+        /// </summary>
+        public List<string> HealthRecommendations { get; set; } = new();
+
+        /// <summary>
+        /// When health monitoring was performed
+        /// </summary>
+        public DateTime MonitoredAt { get; set; }
+
+        /// <summary>
+        /// Additional monetization health details
+        /// </summary>
+        public Dictionary<string, object>? HealthDetails { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/PurchaseValidationRequestDto.cs b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/PurchaseValidationRequestDto.cs
new file mode 100644
index 0000000..6b796e1
--- /dev/null
+++ b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/PurchaseValidationRequestDto.cs
@@ -0,0 +1,72 @@
+/*
+ * File: D:\shadowed-realms-mobile\ShadowedRealmsMobile\src\server\ShadowedRealms.Shared\DTOs\Purchase\PurchaseValidationRequestDto.cs
+ * Created: 2025-10-23
+ * Last Modified: 2025-10-23
+ * Description: Request DTO for purchase validation operations
+ * Last Edit Notes: Individual file implementation for purchase validation input with fraud detection and balance monitoring
+ */
+
+using System.ComponentModel.DataAnnotations;
+
+namespace ShadowedRealms.Shared.DTOs.Purchase
+{
+    /// <summary>
+    /// Request DTO for purchase validation operations
+    /// </summary>
+    public class PurchaseValidationRequestDto
+    {
+        /// <summary>
+        /// Item or package being validated for purchase
+        /// </summary>
+        [Required]
+        [StringLength(100)]
+        public string ItemId { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Quantity being validated for purchase
+        /// </summary>
+        [Range(1, int.MaxValue)]
+        public int Quantity { get; set; } = 1;
+
+        /// <summary>
+        /// Purchase amount to validate
+        /// </summary>
+        [Range(0.01, double.MaxValue)]
+        public decimal PurchaseAmount { get; set; }
+
+        /// <summary>
+        /// Currency code for validation
+        /// </summary>
+        [Required]
+        [StringLength(3)]
+        public string CurrencyCode { get; set; } = string.Empty;
+
+        /// <summary>
+        /// External transaction ID for validation
+        /// </summary>
+        [Required]
+        [StringLength(200)]
+        public string TransactionId { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Payment method to validate
+        /// </summary>
+        [StringLength(50)]
+        public string? PaymentMethod { get; set; }
+
+        /// <summary>
+        /// Include anti-pay-to-win balance check
+        /// </summary>
+        public bool IncludeBalanceCheck { get; set; } = true;
+
+        /// <summary>
+        /// Include fraud detection analysis
+        /// </summary>
+        public bool IncludeFraudDetection { get; set; } = true;
+
+        /// <summary>
+        /// Additional validation parameters
+        /// </summary>
+        public Dictionary<string, object>? ValidationParameters { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/RefundRequestDto.cs b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/RefundRequestDto.cs
new file mode 100644
index 0000000..591ea3d
--- /dev/null
+++ b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/RefundRequestDto.cs
@@ -0,0 +1,73 @@
+/*
+ * File: D:\shadowed-realms-mobile\ShadowedRealmsMobile\src\server\ShadowedRealms.Shared\DTOs\Purchase\RefundRequestDto.cs
+ * Created: 2025-10-23
+ * Last Modified: 2025-10-23
+ * Description: Request DTO for refund processing operations
+ * Last Edit Notes: Individual file implementation for refund processing with chargeback protection and VIP tier considerations
+ */
+
+using System.ComponentModel.DataAnnotations;
+
+namespace ShadowedRealms.Shared.DTOs.Purchase
+{
+    /// <summary>
+    /// Request DTO for refund processing operations
+    /// </summary>
+    public class RefundRequestDto
+    {
+        /// <summary>
+        /// Original transaction ID to be refunded
+        /// </summary>
+        [Required]
+        [StringLength(200)]
+        public string OriginalTransactionId { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Reason for the refund request
+        /// </summary>
+        [Required]
+        [StringLength(500)]
+        public string RefundReason { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Refund amount requested
+        /// </summary>
+        [Range(0.01, double.MaxValue)]
+        public decimal RefundAmount { get; set; }
+
+        /// <summary>
+        /// Currency code for the refund
+        /// </summary>
+        [Required]
+        [StringLength(3)]
+        public string CurrencyCode { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Refund type (partial, full, chargeback)
+        /// </summary>
+        [Required]
+        [StringLength(50)]
+        public string RefundType { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Whether to adjust VIP progression for refund
+        /// </summary>
+        public bool AdjustVipProgression { get; set; } = true;
+
+        /// <summary>
+        /// Whether to remove purchased items/benefits
+        /// </summary>
+        public bool RemovePurchasedItems { get; set; } = true;
+
+        /// <summary>
+        /// External refund reference from payment processor
+        /// </summary>
+        [StringLength(200)]
+        public string? ExternalRefundReference { get; set; }
+
+        /// <summary>
+        /// Additional refund processing parameters
+        /// </summary>
+        public Dictionary<string, object>? RefundParameters { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/RefundResponseDto.cs b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/RefundResponseDto.cs
new file mode 100644
index 0000000..79767e5
--- /dev/null
+++ b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/RefundResponseDto.cs
@@ -0,0 +1,76 @@
+/*
+ * File: D:\shadowed-realms-mobile\ShadowedRealmsMobile\src\server\ShadowedRealms.Shared\DTOs\Purchase\RefundResponseDto.cs
+ * Created: 2025-10-23
+ * Last Modified: 2025-10-23
+ * Description: Response DTO for refund processing results
+ * Last Edit Notes: Individual file implementation for refund processing results with VIP adjustment and item removal tracking
+ */
+
+namespace ShadowedRealms.Shared.DTOs.Purchase
+{
+    /// <summary>
+    /// Response DTO for refund processing results
+    /// </summary>
+    public class RefundResponseDto
+    {
+        /// <summary>
+        /// Whether the refund was successfully processed
+        /// </summary>
+        public bool IsRefunded { get; set; }
+
+        /// <summary>
+        /// Player receiving the refund
+        /// </summary>
+        public int PlayerId { get; set; }
+
+        /// <summary>
+        /// Original transaction ID that was refunded
+        /// </summary>
+        public string OriginalTransactionId { get; set; } = string.Empty;
+
+        /// <summary>
+        /// New refund transaction ID
+        /// </summary>
+        public string RefundTransactionId { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Amount successfully refunded
+        /// </summary>
+        public decimal RefundedAmount { get; set; }
+
+        /// <summary>
+        /// Currency of the refund
+        /// </summary>
+        public string CurrencyCode { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Type of refund processed
+        /// </summary>
+        public string RefundType { get; set; } = string.Empty;
+
+        /// <summary>
+        /// VIP progression adjustments made
+        /// </summary>
+        public Dictionary<string, object> VipAdjustments { get; set; } = new();
+
+        /// <summary>
+        /// Items/benefits removed due to refund
+        /// </summary>
+        public List<string> RemovedItems { get; set; } = new();
+
+        /// <summary>
+        /// External payment processor response
+        /// </summary>
+        public Dictionary<string, object>? PaymentProcessorResponse { get; set; }
+
+        /// <summary>
+        /// When the refund was processed
+        /// </summary>
+        public DateTime ProcessedAt { get; set; }
+
+        /// <summary>
+        /// Additional refund processing details
+        /// </summary>
+        public Dictionary<string, object>? RefundDetails { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/SkillAlternativesRequestDto.cs b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/SkillAlternativesRequestDto.cs
new file mode 100644
index 0000000..5cbf8a9
--- /dev/null
+++ b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/SkillAlternativesRequestDto.cs
@@ -0,0 +1,70 @@
+/*
+ * File: D:\shadowed-realms-mobile\ShadowedRealmsMobile\src\server\ShadowedRealms.Shared\DTOs\Purchase\SkillAlternativesRequestDto.cs
+ * Created: 2025-10-23
+ * Last Modified: 2025-10-23
+ * Description: Request DTO for skill-based alternatives to premium purchases
+ * Last Edit Notes: Individual file implementation for anti-pay-to-win skill alternatives with achievement-based rewards
+ */
+
+using System.ComponentModel.DataAnnotations;
+
+namespace ShadowedRealms.Shared.DTOs.Purchase
+{
+    /// <summary>
+    /// Request DTO for skill-based alternatives to premium purchases
+    /// </summary>
+    public class SkillAlternativesRequestDto
+    {
+        /// <summary>
+        /// Premium item or benefit player wants skill alternative for
+        /// </summary>
+        [Required]
+        [StringLength(100)]
+        public string PremiumItemId { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Category of premium benefit (combat, economic, convenience, cosmetic)
+        /// </summary>
+        [Required]
+        [StringLength(50)]
+        public string BenefitCategory { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Player's current skill level in relevant category
+        /// </summary>
+        [Range(1, 100)]
+        public int CurrentSkillLevel { get; set; } = 1;
+
+        /// <summary>
+        /// Desired effectiveness percentage (max 70% for F2P balance)
+        /// </summary>
+        [Range(1, 70)]
+        public int DesiredEffectiveness { get; set; } = 50;
+
+        /// <summary>
+        /// Time player is willing to invest (hours per day)
+        /// </summary>
+        [Range(0.5, 24.0)]
+        public double TimeCommitment { get; set; } = 2.0;
+
+        /// <summary>
+        /// Player's preferred skill challenge types
+        /// </summary>
+        public List<string> PreferredChallenges { get; set; } = new();
+
+        /// <summary>
+        /// Whether to include alliance-based skill alternatives
+        /// </summary>
+        public bool IncludeAllianceAlternatives { get; set; } = true;
+
+        /// <summary>
+        /// Whether to include kingdom event alternatives
+        /// </summary>
+        public bool IncludeKingdomEventAlternatives { get; set; } = true;
+
+        /// <summary>
+        /// Additional skill alternative parameters
+        /// </summary>
+        public Dictionary<string, object>? AlternativeParameters { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/SkillAlternativesResponseDto.cs b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/SkillAlternativesResponseDto.cs
new file mode 100644
index 0000000..e991546
--- /dev/null
+++ b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/SkillAlternativesResponseDto.cs
@@ -0,0 +1,81 @@
+/*
+ * File: D:\shadowed-realms-mobile\ShadowedRealmsMobile\src\server\ShadowedRealms.Shared\DTOs\Purchase\SkillAlternativesResponseDto.cs
+ * Created: 2025-10-23
+ * Last Modified: 2025-10-23
+ * Description: Response DTO for skill-based alternatives to premium purchases
+ * Last Edit Notes: Individual file implementation for skill alternatives with achievement paths and effectiveness tracking
+ */
+
+namespace ShadowedRealms.Shared.DTOs.Purchase
+{
+    /// <summary>
+    /// Response DTO for skill-based alternatives to premium purchases
+    /// </summary>
+    public class SkillAlternativesResponseDto
+    {
+        /// <summary>
+        /// Player requesting skill alternatives
+        /// </summary>
+        public int PlayerId { get; set; }
+
+        /// <summary>
+        /// Premium item being replaced with skill alternatives
+        /// </summary>
+        public string PremiumItemId { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Maximum effectiveness achievable through skill (typically 70%)
+        /// </summary>
+        public int MaxSkillEffectiveness { get; set; }
+
+        /// <summary>
+        /// Player's current effectiveness level
+        /// </summary>
+        public int CurrentEffectiveness { get; set; }
+
+        /// <summary>
+        /// Available skill-based achievement paths
+        /// </summary>
+        public List<Dictionary<string, object>> SkillPaths { get; set; } = new();
+
+        /// <summary>
+        /// Recommended daily activities for skill building
+        /// </summary>
+        public List<Dictionary<string, object>> DailyActivities { get; set; } = new();
+
+        /// <summary>
+        /// Alliance-based skill alternatives available
+        /// </summary>
+        public List<Dictionary<string, object>> AllianceAlternatives { get; set; } = new();
+
+        /// <summary>
+        /// Kingdom event opportunities for skill advancement
+        /// </summary>
+        public List<Dictionary<string, object>> KingdomEventOpportunities { get; set; } = new();
+
+        /// <summary>
+        /// Achievement milestones and rewards
+        /// </summary>
+        public Dictionary<string, object> AchievementMilestones { get; set; } = new();
+
+        /// <summary>
+        /// Estimated time to reach desired effectiveness
+        /// </summary>
+        public Dictionary<string, object> TimeEstimates { get; set; } = new();
+
+        /// <summary>
+        /// Progress tracking for existing skill alternatives
+        /// </summary>
+        public Dictionary<string, object>? CurrentProgress { get; set; }
+
+        /// <summary>
+        /// When alternatives were calculated
+        /// </summary>
+        public DateTime CalculatedAt { get; set; }
+
+        /// <summary>
+        /// Additional skill alternative details
+        /// </summary>
+        public Dictionary<string, object>? AlternativeDetails { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/VipBenefitClaimRequestDto.cs b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/VipBenefitClaimRequestDto.cs
new file mode 100644
index 0000000..16303c4
--- /dev/null
+++ b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/VipBenefitClaimRequestDto.cs
@@ -0,0 +1,70 @@
+/*
+ * File: D:\shadowed-realms-mobile\ShadowedRealmsMobile\src\server\ShadowedRealms.Shared\DTOs\Purchase\VipBenefitClaimRequestDto.cs
+ * Created: 2025-10-23
+ * Last Modified: 2025-10-23
+ * Description: Request DTO for VIP benefit claim operations
+ * Last Edit Notes: Individual file implementation for VIP benefit claiming with secret tier support and eligibility validation
+ */
+
+using System.ComponentModel.DataAnnotations;
+
+namespace ShadowedRealms.Shared.DTOs.Purchase
+{
+    /// <summary>
+    /// Request DTO for VIP benefit claim operations
+    /// </summary>
+    public class VipBenefitClaimRequestDto
+    {
+        /// <summary>
+        /// Type of benefit being claimed
+        /// </summary>
+        [Required]
+        [StringLength(100)]
+        public string BenefitType { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Specific benefit identifier
+        /// </summary>
+        [Required]
+        [StringLength(100)]
+        public string BenefitId { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Quantity of benefit to claim
+        /// </summary>
+        [Range(1, int.MaxValue)]
+        public int Quantity { get; set; } = 1;
+
+        /// <summary>
+        /// Whether this is a secret tier benefit
+        /// </summary>
+        public bool IsSecretTierBenefit { get; set; } = false;
+
+        /// <summary>
+        /// Claim frequency type (daily, weekly, monthly, one-time)
+        /// </summary>
+        [StringLength(50)]
+        public string? ClaimFrequency { get; set; }
+
+        /// <summary>
+        /// Whether to validate eligibility before claiming
+        /// </summary>
+        public bool ValidateEligibility { get; set; } = true;
+
+        /// <summary>
+        /// Whether to apply bonus multipliers
+        /// </summary>
+        public bool ApplyBonusMultipliers { get; set; } = true;
+
+        /// <summary>
+        /// Target resource or item for benefit application
+        /// </summary>
+        [StringLength(100)]
+        public string? TargetResource { get; set; }
+
+        /// <summary>
+        /// Additional claim parameters
+        /// </summary>
+        public Dictionary<string, object>? ClaimParameters { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/VipBenefitClaimResponseDto.cs b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/VipBenefitClaimResponseDto.cs
new file mode 100644
index 0000000..8d5251d
--- /dev/null
+++ b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/VipBenefitClaimResponseDto.cs
@@ -0,0 +1,91 @@
+/*
+ * File: D:\shadowed-realms-mobile\ShadowedRealmsMobile\src\server\ShadowedRealms.Shared\DTOs\Purchase\VipBenefitClaimResponseDto.cs
+ * Created: 2025-10-23
+ * Last Modified: 2025-10-23
+ * Description: Response DTO for VIP benefit claim results
+ * Last Edit Notes: Individual file implementation for VIP benefit claim results with cooldown tracking and multiplier calculations
+ */
+
+namespace ShadowedRealms.Shared.DTOs.Purchase
+{
+    /// <summary>
+    /// Response DTO for VIP benefit claim results
+    /// </summary>
+    public class VipBenefitClaimResponseDto
+    {
+        /// <summary>
+        /// Player who claimed the benefit
+        /// </summary>
+        public int PlayerId { get; set; }
+
+        /// <summary>
+        /// Type of benefit that was claimed
+        /// </summary>
+        public string BenefitType { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Specific benefit identifier that was claimed
+        /// </summary>
+        public string BenefitId { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Whether the claim was successful
+        /// </summary>
+        public bool ClaimSuccessful { get; set; }
+
+        /// <summary>
+        /// Quantity of benefit successfully claimed
+        /// </summary>
+        public int ClaimedQuantity { get; set; }
+
+        /// <summary>
+        /// Base benefit value before multipliers
+        /// </summary>
+        public decimal BaseBenefitValue { get; set; }
+
+        /// <summary>
+        /// Final benefit value after all multipliers
+        /// </summary>
+        public decimal FinalBenefitValue { get; set; }
+
+        /// <summary>
+        /// Multipliers applied to the benefit
+        /// </summary>
+        public Dictionary<string, decimal> AppliedMultipliers { get; set; } = new();
+
+        /// <summary>
+        /// Resources or items granted
+        /// </summary>
+        public Dictionary<string, long> GrantedResources { get; set; } = new();
+
+        /// <summary>
+        /// Special items or bonuses granted
+        /// </summary>
+        public List<string> SpecialBenefitsGranted { get; set; } = new();
+
+        /// <summary>
+        /// When this benefit can be claimed again
+        /// </summary>
+        public DateTime? NextClaimAvailable { get; set; }
+
+        /// <summary>
+        /// Remaining claims for this benefit type
+        /// </summary>
+        public int? RemainingClaims { get; set; }
+
+        /// <summary>
+        /// Whether this was a secret tier benefit
+        /// </summary>
+        public bool WasSecretTierBenefit { get; set; }
+
+        /// <summary>
+        /// When the benefit was claimed
+        /// </summary>
+        public DateTime ClaimedAt { get; set; }
+
+        /// <summary>
+        /// Additional claim details and metadata
+        /// </summary>
+        public Dictionary<string, object>? ClaimDetails { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/VipProgressionRequestDto.cs b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/VipProgressionRequestDto.cs
new file mode 100644
index 0000000..82ad49b
--- /dev/null
+++ b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/VipProgressionRequestDto.cs
@@ -0,0 +1,69 @@
+/*
+ * File: D:\shadowed-realms-mobile\ShadowedRealmsMobile\src\server\ShadowedRealms.Shared\DTOs\Purchase\VipProgressionRequestDto.cs
+ * Created: 2025-10-23
+ * Last Modified: 2025-10-23
+ * Description: Request DTO for VIP progression management operations
+ * Last Edit Notes: Individual file implementation for VIP progression with secret tier support and chargeback protection
+ */
+
+using System.ComponentModel.DataAnnotations;
+
+namespace ShadowedRealms.Shared.DTOs.Purchase
+{
+    /// <summary>
+    /// Request DTO for VIP progression management operations
+    /// </summary>
+    public class VipProgressionRequestDto
+    {
+        /// <summary>
+        /// Type of VIP progression operation (advance, adjust, recalculate)
+        /// </summary>
+        [Required]
+        [StringLength(50)]
+        public string ProgressionType { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Purchase amount contributing to VIP progression
+        /// </summary>
+        [Range(0, double.MaxValue)]
+        public decimal? PurchaseAmount { get; set; }
+
+        /// <summary>
+        /// Target VIP level (for manual adjustments)
+        /// </summary>
+        [Range(0, 50)]
+        public int? TargetVipLevel { get; set; }
+
+        /// <summary>
+        /// Whether to include secret tier calculations
+        /// </summary>
+        public bool IncludeSecretTiers { get; set; } = true;
+
+        /// <summary>
+        /// Whether to apply chargeback protection adjustments
+        /// </summary>
+        public bool ApplyChargebackProtection { get; set; } = true;
+
+        /// <summary>
+        /// Reason for VIP progression change
+        /// </summary>
+        [StringLength(200)]
+        public string? ProgressionReason { get; set; }
+
+        /// <summary>
+        /// External transaction reference
+        /// </summary>
+        [StringLength(200)]
+        public string? TransactionReference { get; set; }
+
+        /// <summary>
+        /// Whether to recalculate benefits automatically
+        /// </summary>
+        public bool RecalculateBenefits { get; set; } = true;
+
+        /// <summary>
+        /// Additional progression parameters
+        /// </summary>
+        public Dictionary<string, object>? ProgressionParameters { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/VipProgressionResponseDto.cs b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/VipProgressionResponseDto.cs
new file mode 100644
index 0000000..a1e2657
--- /dev/null
+++ b/ShadowedRealmsMobile/src/server/ShadowedRealms.Shared/DTOs/Purchase/VipProgressionResponseDto.cs
@@ -0,0 +1,81 @@
+/*
+ * File: D:\shadowed-realms-mobile\ShadowedRealmsMobile\src\server\ShadowedRealms.Shared\DTOs\Purchase\VipProgressionResponseDto.cs
+ * Created: 2025-10-23
+ * Last Modified: 2025-10-23
+ * Description: Response DTO for VIP progression management results
+ * Last Edit Notes: Individual file implementation for VIP progression results with secret tier tracking and benefit calculations
+ */
+
+namespace ShadowedRealms.Shared.DTOs.Purchase
+{
+    /// <summary>
+    /// Response DTO for VIP progression management results
+    /// </summary>
+    public class VipProgressionResponseDto
+    {
+        /// <summary>
+        /// Player whose VIP progression was managed
+        /// </summary>
+        public int PlayerId { get; set; }
+
+        /// <summary>
+        /// Previous VIP level before progression
+        /// </summary>
+        public int PreviousVipLevel { get; set; }
+
+        /// <summary>
+        /// New VIP level after progression
+        /// </summary>
+        public int NewVipLevel { get; set; }
+
+        /// <summary>
+        /// Previous VIP points/spending amount
+        /// </summary>
+        public decimal PreviousVipPoints { get; set; }
+
+        /// <summary>
+        /// New VIP points/spending amount
+        /// </summary>
+        public decimal NewVipPoints { get; set; }
+
+        /// <summary>
+        /// Points needed for next VIP level
+        /// </summary>
+        public decimal PointsToNextLevel { get; set; }
+
+        /// <summary>
+        /// Whether player has access to secret tiers
+        /// </summary>
+        public bool HasSecretTierAccess { get; set; }
+
+        /// <summary>
+        /// Secret tier level if applicable
+        /// </summary>
+        public int? SecretTierLevel { get; set; }
+
+        /// <summary>
+        /// New benefits unlocked from progression
+        /// </summary>
+        public List<string> NewBenefitsUnlocked { get; set; } = new();
+
+        /// <summary>
+        /// Updated VIP benefit calculations
+        /// </summary>
+        public Dictionary<string, object> VipBenefits { get; set; } = new();
+
+        /// <summary>
+        /// Chargeback protection status
+        /// </summary>
+        public Dictionary<string, object> ChargebackProtection { get; set; } = new();
+
+        /// <summary>
+        /// When the progression was processed
+        /// </summary>
+        public DateTime ProcessedAt { get; set; }
+
+        /// <summary>
+        /// Additional progression details
+        /// </summary>
+        public Dictionary<string, object>? ProgressionDetails { get; set; }
+    }
+}
\ No newline at end of file