diff --git a/changelog.txt b/changelog.txt
index 6a6382e5f..ca2e11a1f 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,5 +1,8 @@
 EQEMu Changelog (Started on Sept 24, 2003 15:50)
 -------------------------------------------------------
+== 12/11/2013 ==
+demonstar55: Fixed issue with crippling blow from berserker frenzy not actually doing anything
+
 == 12/04/2013 ==
 demonstar55: Fixed SpellType_Charm case in AICastSpell
 
diff --git a/common/ruletypes.h b/common/ruletypes.h
index bc10cbf9b..26083a583 100644
--- a/common/ruletypes.h
+++ b/common/ruletypes.h
@@ -371,6 +371,8 @@ RULE_INT ( Combat, ClientStunLevel, 55) //This is the level where client kicks a
 RULE_INT ( Combat, QuiverWRHasteDiv, 3) //Weight Reduction is divided by this to get haste contribution for quivers
 RULE_BOOL ( Combat, UseArcheryBonusRoll, false) //Make the 51+ archery bonus require an actual roll
 RULE_INT ( Combat, ArcheryBonusChance, 50)
+RULE_INT ( Combat, BerserkerFrenzyStart, 35)
+RULE_INT ( Combat, BerserkerFrenzyEnd, 45)
 RULE_CATEGORY_END()
 
 RULE_CATEGORY( NPC )
diff --git a/zone/attack.cpp b/zone/attack.cpp
index 7cf35e2a2..4623661b5 100644
--- a/zone/attack.cpp
+++ b/zone/attack.cpp
@@ -1173,7 +1173,7 @@ bool Client::Attack(Mob* other, int Hand, bool bRiposte, bool IsStrikethrough, b
 	if(weapon_damage > 0){
 
 		//Berserker Berserk damage bonus
-		if(berserk && GetClass() == BERSERKER){
+		if(IsBerserk() && GetClass() == BERSERKER){
 			int bonus = 3 + GetLevel()/10;		//unverified
 			weapon_damage = weapon_damage * (100+bonus) / 100;
 			mlog(COMBAT__DAMAGE, "Berserker damage bonus increases DMG to %d", weapon_damage);
@@ -4102,19 +4102,15 @@ void Mob::TryCriticalHit(Mob *defender, uint16 skill, int32 &damage, ExtraAttack
 	//Warning: Do not define these rules if you want live like critical hits.
 	critChance += RuleI(Combat, MeleeBaseCritChance);
 
-	if(IsClient())
+	if (IsClient()) {
 		critChance += RuleI(Combat, ClientBaseCritChance);
 
-	bool IsBerserk = false;
-	if(((GetClass() == WARRIOR || GetClass() == BERSERKER) && GetLevel() >= 12 && IsClient()))
-	{
-		if(CastToClient()->berserk){
-			critChance += RuleI(Combat, BerserkBaseCritChance);
-			IsBerserk = true;
+		if ((GetClass() == WARRIOR || GetClass() == BERSERKER) && GetLevel() >= 12) {
+			if (IsBerserk())
+				critChance += RuleI(Combat, BerserkBaseCritChance);
+			else
+				critChance += RuleI(Combat, WarBerBaseCritChance);
 		}
-
-		else
-			critChance += RuleI(Combat, WarBerBaseCritChance);
 	}
 
 	if(skill == SkillArchery && GetClass() == RANGER && GetSkill(SkillArchery) >= 65)
@@ -4154,10 +4150,11 @@ void Mob::TryCriticalHit(Mob *defender, uint16 skill, int32 &damage, ExtraAttack
 			//Crippling Blow Chance: The percent value of the effect is applied
 			//to the your Chance to Critical. (ie You have 10% chance to critical and you
 			//have a 200% Chance to Critical Blow effect, therefore you have a 20% Chance to Critical Blow.
-			if (CripplingBlowChance){
-				critChance *= float(CripplingBlowChance)/100.0f;
+			if (CripplingBlowChance || IsBerserk()) {
+				if (!IsBerserk())
+					critChance *= float(CripplingBlowChance)/100.0f;
 
-				if(MakeRandomFloat(0, 1) < critChance){
+				if (IsBerserk() || MakeRandomFloat(0, 1) < critChance) {
 					critMod = 400;
 					crip_success = true;
 				}
@@ -4166,8 +4163,7 @@ void Mob::TryCriticalHit(Mob *defender, uint16 skill, int32 &damage, ExtraAttack
 			critMod += GetCritDmgMob(skill) * 2; // To account for base crit mod being 200 not 100
 			damage = damage * critMod / 100;
 
-			if(IsBerserk || crip_success)
-			{
+			if (crip_success) {
 				entity_list.MessageClose_StringID(this, false, 200, MT_CritMelee, CRIPPLING_BLOW, GetCleanName(), itoa(damage));
 				// Crippling blows also have a chance to stun
 				//Kayen: Crippling Blow would cause a chance to interrupt for npcs < 55, with a staggers message.
@@ -4175,10 +4171,7 @@ void Mob::TryCriticalHit(Mob *defender, uint16 skill, int32 &damage, ExtraAttack
 					defender->Emote("staggers.");
 					defender->Stun(0);
 				}
-			}
-
-			else
-			{
+			} else {
 				entity_list.MessageClose_StringID(this, false, 200, MT_CritMelee, CRITICAL_HIT, GetCleanName(), itoa(damage));
 			}
 		}
diff --git a/zone/client.h b/zone/client.h
index 0209d422a..8e4a38c16 100644
--- a/zone/client.h
+++ b/zone/client.h
@@ -220,6 +220,7 @@ public:
 	virtual bool HasGroup() { return (GetGroup() ? true : false); }
 	virtual Raid* GetRaid() { return entity_list.GetRaidByClient(this); }
 	virtual Group* GetGroup() { return entity_list.GetGroupByClient(this); }
+	virtual inline bool IsBerserk() { return berserk; }
 
 	void	AI_Init();
 	void	AI_Start(uint32 iMoveDelay = 0);
diff --git a/zone/client_process.cpp b/zone/client_process.cpp
index 8bb3fd67c..9158f3bf2 100644
--- a/zone/client_process.cpp
+++ b/zone/client_process.cpp
@@ -464,13 +464,13 @@ bool Client::Process() {
 		}
 
 		if (GetClass() == WARRIOR || GetClass() == BERSERKER) {
-			if(!dead && !berserk && this->GetHPRatio() < 30) {
+			if (!dead && !IsBerserk() && GetHPRatio() < RuleI(Combat, BerserkerFrenzyStart)) {
 				entity_list.MessageClose_StringID(this, false, 200, 0, BERSERK_START, GetName());
-				this->berserk = true;
+				berserk = true;
 			}
-			if (berserk && this->GetHPRatio() > 30) {
+			if (IsBerserk() && GetHPRatio() > RuleI(Combat, BerserkerFrenzyEnd)) {
 				entity_list.MessageClose_StringID(this, false, 200, 0, BERSERK_END, GetName());
-				this->berserk = false;
+				berserk = false;
 			}
 		}
 
diff --git a/zone/mob.h b/zone/mob.h
index 962bef3c8..2d58f0d79 100644
--- a/zone/mob.h
+++ b/zone/mob.h
@@ -126,6 +126,7 @@ public:
 	void ApplyMeleeDamageBonus(uint16 skill, int32 &damage);
 	virtual void MeleeMitigation(Mob *attacker, int32 &damage, int32 minhit, ExtraAttackOptions *opts = nullptr);
 	bool CombatRange(Mob* other);
+	virtual inline bool IsBerserk() { return false; } // only clients
 
 	//Appearance
 	void SendLevelAppearance();