diff --git a/src/actor.h b/src/actor.h
index 168205526..993b264f7 100644
--- a/src/actor.h
+++ b/src/actor.h
@@ -1008,6 +1008,7 @@ public:
 	bool SetState (FState *newstate, bool nofunction=false);
 	virtual bool UpdateWaterLevel (fixed_t oldz, bool splash=true);
 	bool isFast();
+	bool isSlow();
 	void SetIdle();
 	void ClearCounters();
 
diff --git a/src/g_level.h b/src/g_level.h
index c431b9695..4a84e6871 100644
--- a/src/g_level.h
+++ b/src/g_level.h
@@ -554,6 +554,7 @@ enum ESkillProperty
 	SKILLP_NoPain,
 	SKILLP_ArmorFactor,
 	SKILLP_EasyKey,
+	SKILLP_SlowMonsters,
 };
 int G_SkillProperty(ESkillProperty prop);
 const char * G_SkillName();
@@ -568,6 +569,7 @@ struct FSkillInfo
 	fixed_t AmmoFactor, DoubleAmmoFactor, DropAmmoFactor;
 	fixed_t DamageFactor;
 	bool FastMonsters;
+	bool SlowMonsters;
 	bool DisableCheats;
 	bool AutoUseHealth;
 
diff --git a/src/g_skill.cpp b/src/g_skill.cpp
index 46b9a1702..ddfdbb4cc 100644
--- a/src/g_skill.cpp
+++ b/src/g_skill.cpp
@@ -64,6 +64,7 @@ void FMapInfoParser::ParseSkill ()
 	skill.DropAmmoFactor = -1;
 	skill.DamageFactor = FRACUNIT;
 	skill.FastMonsters = false;
+	skill.SlowMonsters = false;
 	skill.DisableCheats = false;
 	skill.EasyBossBrain = false;
 	skill.EasyKey = false;
@@ -118,6 +119,10 @@ void FMapInfoParser::ParseSkill ()
 		{
 			skill.FastMonsters = true;
 		}
+		else if (sc.Compare ("slowmonsters"))
+		{
+			skill.SlowMonsters = true;
+		}
 		else if (sc.Compare ("disablecheats"))
 		{
 			skill.DisableCheats = true;
@@ -336,6 +341,9 @@ int G_SkillProperty(ESkillProperty prop)
 		case SKILLP_FastMonsters:
 			return AllSkills[gameskill].FastMonsters  || (dmflags & DF_FAST_MONSTERS);
 
+		case SKILLP_SlowMonsters:
+			return AllSkills[gameskill].SlowMonsters;
+
 		case SKILLP_Respawn:
 			if (dmflags & DF_MONSTERS_RESPAWN && AllSkills[gameskill].RespawnCounter==0) 
 				return TICRATE * gameinfo.defaultrespawntime;
@@ -433,6 +441,7 @@ FSkillInfo &FSkillInfo::operator=(const FSkillInfo &other)
 	DropAmmoFactor = other.DropAmmoFactor;
 	DamageFactor = other.DamageFactor;
 	FastMonsters = other.FastMonsters;
+	SlowMonsters = other.SlowMonsters;
 	DisableCheats = other.DisableCheats;
 	AutoUseHealth = other.AutoUseHealth;
 	EasyBossBrain = other.EasyBossBrain;
diff --git a/src/info.h b/src/info.h
index 9a316c78d..51c4bd629 100644
--- a/src/info.h
+++ b/src/info.h
@@ -77,6 +77,7 @@ struct FState
 	BYTE		Fast:1;
 	BYTE		NoDelay:1;		// Spawn states executes its action normally
 	BYTE		CanRaise:1;		// Allows a monster to be resurrected without waiting for an infinate frame
+	BYTE		Slow:1;			// Inverse of fast
 	int			ParameterIndex;
 
 	inline int GetFrame() const
diff --git a/src/p_enemy.cpp b/src/p_enemy.cpp
index decc6de7b..14c6b68aa 100644
--- a/src/p_enemy.cpp
+++ b/src/p_enemy.cpp
@@ -1542,7 +1542,6 @@ bool P_LookForEnemies (AActor *actor, INTBOOL allaround, FLookExParams *params)
 bool P_LookForPlayers (AActor *actor, INTBOOL allaround, FLookExParams *params)
 {
 	int 		c;
-	int 		stop;
 	int			pnum;
 	player_t*	player;
 	bool chasegoal = params? (!(params->flags & LOF_DONTCHASEGOAL)) : true;
@@ -1615,20 +1614,22 @@ bool P_LookForPlayers (AActor *actor, INTBOOL allaround, FLookExParams *params)
 	{
 		pnum = actor->LastLookPlayerNumber;
 	}
-	stop = (pnum - 1) & (MAXPLAYERS-1);
 		
 	for (;;)
 	{
-		pnum = (pnum + 1) & (MAXPLAYERS-1);
-		if (!playeringame[pnum])
-			continue;
-
-		if (actor->TIDtoHate == 0)
+		// [ED850] Each and every player should only ever be checked once.
+		if (c++ < MAXPLAYERS)
 		{
-			actor->LastLookPlayerNumber = pnum;
-		}
+			pnum = (pnum + 1) & (MAXPLAYERS - 1);
+			if (!playeringame[pnum])
+				continue;
 
-		if (++c == MAXPLAYERS-1 || pnum == stop)
+			if (actor->TIDtoHate == 0)
+			{
+				actor->LastLookPlayerNumber = pnum;
+			}
+		}
+		else
 		{
 			// done looking
 			if (actor->target == NULL)
@@ -1692,11 +1693,11 @@ bool P_LookForPlayers (AActor *actor, INTBOOL allaround, FLookExParams *params)
 					&& P_AproxDistance (player->mo->velx, player->mo->vely)
 					< 5*FRACUNIT)
 				{ // Player is sneaking - can't detect
-					return false;
+					continue;
 				}
 				if (pr_lookforplayers() < 225)
 				{ // Player isn't sneaking, but still didn't detect
-					return false;
+					continue;
 				}
 			}
 		}
diff --git a/src/p_mobj.cpp b/src/p_mobj.cpp
index 2a26d7ef0..f519ba763 100644
--- a/src/p_mobj.cpp
+++ b/src/p_mobj.cpp
@@ -405,7 +405,7 @@ bool AActor::InStateSequence(FState * newstate, FState * basestate)
 //
 // Get the actual duration of the next state
 // We are using a state flag now to indicate a state that should be
-// accelerated in Fast mode.
+// accelerated in Fast mode or slowed in Slow mode.
 //
 //==========================================================================
 
@@ -416,6 +416,10 @@ int AActor::GetTics(FState * newstate)
 	{
 		return tics - (tics>>1);
 	}
+	else if (isSlow() && newstate->Slow)
+	{
+		return tics<<1;
+	}
 	return tics;
 }
 
@@ -4082,6 +4086,11 @@ bool AActor::isFast()
 	return !!G_SkillProperty(SKILLP_FastMonsters);
 }
 
+bool AActor::isSlow()
+{
+	return !!G_SkillProperty(SKILLP_SlowMonsters);
+}
+
 void AActor::Activate (AActor *activator)
 {
 	if ((flags3 & MF3_ISMONSTER) && (health > 0 || (flags & MF_ICECORPSE)))
diff --git a/src/thingdef/thingdef_states.cpp b/src/thingdef/thingdef_states.cpp
index 5cc2de1c0..6a28e54cd 100644
--- a/src/thingdef/thingdef_states.cpp
+++ b/src/thingdef/thingdef_states.cpp
@@ -275,6 +275,11 @@ do_stop:
 					state.Fast = true;
 					continue;
 				}
+				if (sc.Compare("SLOW")) 
+				{
+					state.Slow = true;
+					continue;
+				}
 				if (sc.Compare("NODELAY"))
 				{
 					if (bag.statedef.GetStateLabelIndex(NAME_Spawn) == bag.statedef.GetStateCount())
diff --git a/wadsrc/static/actors/strife/acolyte.txt b/wadsrc/static/actors/strife/acolyte.txt
index 1d04147f0..3ca1dec62 100644
--- a/wadsrc/static/actors/strife/acolyte.txt
+++ b/wadsrc/static/actors/strife/acolyte.txt
@@ -39,16 +39,16 @@ ACTOR Acolyte : StrifeHumanoid
 		AGRD ABCDABCD 5 A_Wander
 		Loop
 	See:
-		AGRD A 6 A_AcolyteBits
-		AGRD BCD 6 A_Chase
+		AGRD A 6 Fast Slow A_AcolyteBits
+		AGRD BCD 6 Fast Slow A_Chase
 		Loop
 	Missile:
-		AGRD E 8 A_FaceTarget
-		AGRD FE 4 A_ShootGun
-		AGRD F 6 A_ShootGun
+		AGRD E 8 Fast Slow A_FaceTarget
+		AGRD FE 4 Fast Slow A_ShootGun
+		AGRD F 6 Fast Slow A_ShootGun
 		Goto See
 	Pain:
-		AGRD O 8 A_Pain
+		AGRD O 8 Fast Slow A_Pain
 		Goto See
 	Death:
 		AGRD G 4
@@ -170,8 +170,8 @@ ACTOR AcolyteShadow : Acolyte 58
 		AGRD A 6 A_BeShadowyFoe
 		Goto Super::See+1
 	Pain:
-		AGRD O 0 A_SetShadow
-		AGRD O 8 A_Pain
+		AGRD O 0 Fast Slow A_SetShadow
+		AGRD O 8 Fast Slow A_Pain
 		Goto See
 	}
 }
diff --git a/wadsrc/static/actors/strife/crusader.txt b/wadsrc/static/actors/strife/crusader.txt
index 36d89ed57..7f7a0d0c5 100644
--- a/wadsrc/static/actors/strife/crusader.txt
+++ b/wadsrc/static/actors/strife/crusader.txt
@@ -42,19 +42,16 @@ ACTOR Crusader 3005
 		ROB2 AABBCCDD 3 A_Chase
 		Loop
 	Missile:
-		ROB2 E 3 A_FaceTarget
-		ROB2 F 2 Bright A_CrusaderChoose
-		ROB2 E 2 Bright A_CrusaderSweepLeft
-		ROB2 F 3 Bright A_CrusaderSweepLeft
-		ROB2 E 2 Bright A_CrusaderSweepLeft
-		ROB2 F 2 Bright A_CrusaderSweepLeft
-		ROB2 E 2 Bright A_CrusaderSweepRight
-		ROB2 F 2 Bright A_CrusaderSweepRight
-		ROB2 E 2 Bright A_CrusaderSweepRight
-		ROB2 F 2 A_CrusaderRefire
+		ROB2 E 3 Slow A_FaceTarget
+		ROB2 F 2 Slow Bright A_CrusaderChoose
+		ROB2 E 2 Slow Bright A_CrusaderSweepLeft
+		ROB2 F 3 Slow Bright A_CrusaderSweepLeft
+		ROB2 EF 2 Slow Bright A_CrusaderSweepLeft
+		ROB2 EFE 2 Slow Bright A_CrusaderSweepRight
+		ROB2 F 2 Slow A_CrusaderRefire
 		Loop
 	Pain:
-		ROB2 D 1 A_Pain
+		ROB2 D 1 Slow A_Pain
 		Goto See
 	Death:
 		ROB2 G 3 A_Scream
diff --git a/wadsrc/static/actors/strife/reaver.txt b/wadsrc/static/actors/strife/reaver.txt
index 23439b9ba..a69947373 100644
--- a/wadsrc/static/actors/strife/reaver.txt
+++ b/wadsrc/static/actors/strife/reaver.txt
@@ -32,16 +32,16 @@ ACTOR Reaver 3001
 		ROB1 BBCCDDEE 3 A_Chase
 		Loop
 	Melee:
-		ROB1 H 6 A_FaceTarget
-		ROB1 I 8 A_CustomMeleeAttack(random[ReaverMelee](1,8)*3, "reaver/blade")
-		ROB1 H 6
+		ROB1 H 6 Slow A_FaceTarget
+		ROB1 I 8 Slow A_CustomMeleeAttack(random[ReaverMelee](1,8)*3, "reaver/blade")
+		ROB1 H 6 Slow
 		Goto See
 	Missile:
-		ROB1 F 8 A_FaceTarget
-		ROB1 G 11 BRIGHT A_ReaverRanged
+		ROB1 F 8 Slow A_FaceTarget
+		ROB1 G 11 Slow BRIGHT A_ReaverRanged
 		Goto See
 	Pain:
-		ROB1 A 2
+		ROB1 A 2 Slow
 		ROB1 A 2 A_Pain
 		Goto See
 	Death:
diff --git a/wadsrc/static/actors/strife/stalker.txt b/wadsrc/static/actors/strife/stalker.txt
index 80732131e..0a537c762 100644
--- a/wadsrc/static/actors/strife/stalker.txt
+++ b/wadsrc/static/actors/strife/stalker.txt
@@ -45,14 +45,14 @@ ACTOR Stalker 186
 		STLK J 10 A_Look
 		Loop
 	See:
-		STLK A 1 A_StalkerChaseDecide
-		STLK ABB 3 A_Chase
-		STLK C 3 A_StalkerWalk
-		STLK C 3 A_Chase
+		STLK A 1 Slow A_StalkerChaseDecide
+		STLK ABB 3 Slow A_Chase
+		STLK C 3 Slow A_StalkerWalk
+		STLK C 3 Slow A_Chase
 		Loop
 	Melee:
-		STLK J 3 A_FaceTarget
-		STLK K 3 A_StalkerAttack
+		STLK J 3 Slow A_FaceTarget
+		STLK K 3 Slow A_StalkerAttack
 	SeeFloor:
 		STLK J 3 A_StalkerWalk
 		STLK KK 3 A_Chase
diff --git a/wadsrc/static/actors/strife/strifestuff.txt b/wadsrc/static/actors/strife/strifestuff.txt
index b0f4024f4..ef762cbb6 100644
--- a/wadsrc/static/actors/strife/strifestuff.txt
+++ b/wadsrc/static/actors/strife/strifestuff.txt
@@ -1786,8 +1786,8 @@ ACTOR CeilingTurret 27
 		Loop
 	Missile:
 	Pain:
-		TURT B 4 A_ShootGun
-		TURT D 3 A_SentinelRefire
+		TURT B 4 Slow A_ShootGun
+		TURT D 3 Slow A_SentinelRefire
 		TURT A 4 A_SentinelRefire
 		Loop
 	Death:
diff --git a/wadsrc/static/mapinfo/strife.txt b/wadsrc/static/mapinfo/strife.txt
index 83c2285e6..5a25f3779 100644
--- a/wadsrc/static/mapinfo/strife.txt
+++ b/wadsrc/static/mapinfo/strife.txt
@@ -238,6 +238,7 @@ skill baby
 	AmmoFactor = 2
 	DamageFactor = 0.5
 	EasyBossBrain
+	SlowMonsters
 	SpawnFilter = Baby
 	PicName = "M_JKILL"
 	Name = "$SSKILL_BABY"