diff --git a/docs/rh-log.txt b/docs/rh-log.txt
index aac863aa2d..bd69cdcc5c 100644
--- a/docs/rh-log.txt
+++ b/docs/rh-log.txt
@@ -1,4 +1,9 @@
 June 5, 2009  (Changes by Graf Zahl)
+- Added MF6_FORCEPAIN flag that forces the target to go into the pain state
+  regardless of pain chance.
+- Changed screenblocks CVAR to be settable per game.
+- Added SpawnSpotForced and SpawnSpotFacingForced ACS functions.
+- Added pushfactor actor property.
 - Added Gez's GetArmorType submission
 
 June 2, 2009
diff --git a/src/actor.h b/src/actor.h
index 1b144a56ca..61c45c6fd0 100644
--- a/src/actor.h
+++ b/src/actor.h
@@ -307,6 +307,7 @@ enum
 	MF6_NOBOSSRIP		= 0x00000001,	// For rippermissiles: Don't rip through bosses.
 	MF6_THRUSPECIES		= 0x00000002,	// Actors passes through other of the same species.
 	MF6_MTHRUSPECIES	= 0x00000004,	// Missile passes through actors of its shooter's species.
+	MF6_FORCEPAIN		= 0x00000008,	// forces target into painstate (unless it has the NOPAIN flag)
 
 
 // --- mobj.renderflags ---
@@ -736,6 +737,7 @@ public:
 	int				bouncecount;	// Strife's grenades only bounce twice before exploding
 	fixed_t			gravity;		// [GRB] Gravity factor
 	int 			FastChaseStrafeCount;
+	fixed_t			pushfactor;
 
 	AActor			*BlockingMobj;	// Actor that blocked the last move
 	line_t			*BlockingLine;	// Line that blocked the last move
diff --git a/src/p_acs.cpp b/src/p_acs.cpp
index 93aa5bb073..5f8d42a9c8 100644
--- a/src/p_acs.cpp
+++ b/src/p_acs.cpp
@@ -2230,7 +2230,7 @@ void DLevelScript::ReplaceTextures (int fromnamei, int tonamei, int flags)
 	}
 }
 
-int DLevelScript::DoSpawn (int type, fixed_t x, fixed_t y, fixed_t z, int tid, int angle)
+int DLevelScript::DoSpawn (int type, fixed_t x, fixed_t y, fixed_t z, int tid, int angle, bool force)
 {
 	const PClass *info = PClass::FindClass (FBehavior::StaticLookupString (type));
 	AActor *actor = NULL;
@@ -2243,7 +2243,7 @@ int DLevelScript::DoSpawn (int type, fixed_t x, fixed_t y, fixed_t z, int tid, i
 		{
 			DWORD oldFlags2 = actor->flags2;
 			actor->flags2 |= MF2_PASSMOBJ;
-			if (P_TestMobjLocation (actor))
+			if (force || P_TestMobjLocation (actor))
 			{
 				actor->angle = angle << 24;
 				actor->tid = tid;
@@ -2274,7 +2274,7 @@ int DLevelScript::DoSpawn (int type, fixed_t x, fixed_t y, fixed_t z, int tid, i
 	return spawncount;
 }
 
-int DLevelScript::DoSpawnSpot (int type, int spot, int tid, int angle)
+int DLevelScript::DoSpawnSpot (int type, int spot, int tid, int angle, bool force)
 {
 	FActorIterator iterator (spot);
 	AActor *aspot;
@@ -2282,12 +2282,12 @@ int DLevelScript::DoSpawnSpot (int type, int spot, int tid, int angle)
 
 	while ( (aspot = iterator.Next ()) )
 	{
-		spawned += DoSpawn (type, aspot->x, aspot->y, aspot->z, tid, angle);
+		spawned += DoSpawn (type, aspot->x, aspot->y, aspot->z, tid, angle, force);
 	}
 	return spawned;
 }
 
-int DLevelScript::DoSpawnSpotFacing (int type, int spot, int tid)
+int DLevelScript::DoSpawnSpotFacing (int type, int spot, int tid, bool force)
 {
 	FActorIterator iterator (spot);
 	AActor *aspot;
@@ -2295,7 +2295,7 @@ int DLevelScript::DoSpawnSpotFacing (int type, int spot, int tid)
 
 	while ( (aspot = iterator.Next ()) )
 	{
-		spawned += DoSpawn (type, aspot->x, aspot->y, aspot->z, tid, aspot->angle >> 24);
+		spawned += DoSpawn (type, aspot->x, aspot->y, aspot->z, tid, aspot->angle >> 24, force);
 	}
 	return spawned;
 }
@@ -2802,6 +2802,8 @@ enum EACSFunctions
 	ACSF_SetAirSupply,
 	ACSF_SetSkyScrollSpeed,
 	ACSF_GetArmorType,
+	ACSF_SpawnSpotForced,
+	ACSF_SpawnSpotFacingForced,
 };
 
 int DLevelScript::SideFromID(int id, int side)
@@ -2960,6 +2962,12 @@ int DLevelScript::CallFunction(int argCount, int funcIndex, SDWORD *args)
 			return 0;
 		}
 
+		case ACSF_SpawnSpotForced:
+			return DoSpawnSpot(args[0], args[1], args[2], args[3], true);
+
+		case ACSF_SpawnSpotFacingForced:
+			return DoSpawnSpotFacing(args[0], args[1], args[2], true);
+
 		default:
 			break;
 	}
@@ -4952,27 +4960,27 @@ int DLevelScript::RunScript ()
 			break;
 
 		case PCD_SPAWN:
-			STACK(6) = DoSpawn (STACK(6), STACK(5), STACK(4), STACK(3), STACK(2), STACK(1));
+			STACK(6) = DoSpawn (STACK(6), STACK(5), STACK(4), STACK(3), STACK(2), STACK(1), false);
 			sp -= 5;
 			break;
 
 		case PCD_SPAWNDIRECT:
-			PushToStack (DoSpawn (pc[0], pc[1], pc[2], pc[3], pc[4], pc[5]));
+			PushToStack (DoSpawn (pc[0], pc[1], pc[2], pc[3], pc[4], pc[5], false));
 			pc += 6;
 			break;
 
 		case PCD_SPAWNSPOT:
-			STACK(4) = DoSpawnSpot (STACK(4), STACK(3), STACK(2), STACK(1));
+			STACK(4) = DoSpawnSpot (STACK(4), STACK(3), STACK(2), STACK(1), false);
 			sp -= 3;
 			break;
 
 		case PCD_SPAWNSPOTDIRECT:
-			PushToStack (DoSpawnSpot (pc[0], pc[1], pc[2], pc[3]));
+			PushToStack (DoSpawnSpot (pc[0], pc[1], pc[2], pc[3], false));
 			pc += 4;
 			break;
 
 		case PCD_SPAWNSPOTFACING:
-			STACK(3) = DoSpawnSpotFacing (STACK(3), STACK(2), STACK(1));
+			STACK(3) = DoSpawnSpotFacing (STACK(3), STACK(2), STACK(1), false);
 			sp -= 2;
 			break;
 
diff --git a/src/p_acs.h b/src/p_acs.h
index 365277b294..824777972a 100644
--- a/src/p_acs.h
+++ b/src/p_acs.h
@@ -712,9 +712,9 @@ protected:
 	static int CountPlayers ();
 	static void SetLineTexture (int lineid, int side, int position, int name);
 	static void ReplaceTextures (int fromname, int toname, int flags);
-	static int DoSpawn (int type, fixed_t x, fixed_t y, fixed_t z, int tid, int angle);
-	static int DoSpawnSpot (int type, int spot, int tid, int angle);
-	static int DoSpawnSpotFacing (int type, int spot, int tid);
+	static int DoSpawn (int type, fixed_t x, fixed_t y, fixed_t z, int tid, int angle, bool force);
+	static int DoSpawnSpot (int type, int spot, int tid, int angle, bool forced);
+	static int DoSpawnSpotFacing (int type, int spot, int tid, bool forced);
 	int DoClassifyActor (int tid);
 	int CallFunction(int argCount, int funcIndex, SDWORD *args);
 
diff --git a/src/p_interaction.cpp b/src/p_interaction.cpp
index 539f055388..9bcadd15bc 100644
--- a/src/p_interaction.cpp
+++ b/src/p_interaction.cpp
@@ -1123,6 +1123,8 @@ void P_DamageMobj (AActor *target, AActor *inflictor, AActor *source, int damage
 				damage = newdam;
 				if (damage <= 0)
 				{
+					// If MF&_FORCEPAIN is set make the player enter the pain state.
+					if (inflictor != NULL && (inflictor->flags6 & MF6_FORCEPAIN)) goto dopain;
 					return;
 				}
 			}
@@ -1254,8 +1256,10 @@ void P_DamageMobj (AActor *target, AActor *inflictor, AActor *source, int damage
 		}
 	}
 	
+dopain:
 	if (!(target->flags5 & MF5_NOPAIN) && (inflictor == NULL || !(inflictor->flags5 & MF5_PAINLESS)) && 
-		(pr_damagemobj() < painchance) && !(target->flags & MF_SKULLFLY))
+		(pr_damagemobj() < painchance || (inflictor != NULL && (inflictor->flags6 & MF6_FORCEPAIN))) && 
+		!(target->flags & MF_SKULLFLY))
 	{
 		if (mod == NAME_Electric)
 		{
diff --git a/src/p_map.cpp b/src/p_map.cpp
index 703e8ab4a4..af1a60f7c1 100644
--- a/src/p_map.cpp
+++ b/src/p_map.cpp
@@ -1037,8 +1037,8 @@ bool PIT_CheckThing (AActor *thing, FCheckPosition &tm)
 	if (thing->flags2 & MF2_PUSHABLE && !(tm.thing->flags2 & MF2_CANNOTPUSH) &&
 		(tm.thing->player == NULL || !(tm.thing->player->cheats & CF_PREDICTING)))
 	{ // Push thing
-		thing->momx += tm.thing->momx >> 2;
-		thing->momy += tm.thing->momy >> 2;
+		thing->momx += FixedMul(tm.thing->momx, thing->pushfactor);
+		thing->momy += FixedMul(tm.thing->momy, thing->pushfactor);
 	}
 	solid = (thing->flags & MF_SOLID) &&
 			!(thing->flags & MF_NOCLIP) &&
diff --git a/src/r_main.cpp b/src/r_main.cpp
index 0a3b57e990..3ab29028ff 100644
--- a/src/r_main.cpp
+++ b/src/r_main.cpp
@@ -686,7 +686,7 @@ void R_ExecuteSetViewSize ()
 //
 //==========================================================================
 
-CUSTOM_CVAR (Int, screenblocks, 10, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
+CUSTOM_CVAR (Int, screenblocks, 10, CVAR_ARCHIVE)
 {
 	if (self > 12)
 		self = 12;
diff --git a/src/thingdef/thingdef_data.cpp b/src/thingdef/thingdef_data.cpp
index 0a199aeb3d..e65d0ea01f 100644
--- a/src/thingdef/thingdef_data.cpp
+++ b/src/thingdef/thingdef_data.cpp
@@ -212,6 +212,7 @@ static FFlagDef ActorFlags[]=
 	DEFINE_FLAG(MF6, NOBOSSRIP, AActor, flags6),
 	DEFINE_FLAG(MF6, THRUSPECIES, AActor, flags6),
 	DEFINE_FLAG(MF6, MTHRUSPECIES, AActor, flags6),
+	DEFINE_FLAG(MF6, FORCEPAIN, AActor, flags6),
 
 	// Effect flags
 	DEFINE_FLAG(FX, VISIBILITYPULSE, AActor, effects),
diff --git a/src/thingdef/thingdef_properties.cpp b/src/thingdef/thingdef_properties.cpp
index e2af1f05ff..fc2765a49e 100644
--- a/src/thingdef/thingdef_properties.cpp
+++ b/src/thingdef/thingdef_properties.cpp
@@ -741,6 +741,15 @@ DEFINE_PROPERTY(missileheight, F, Actor)
 	info->Class->Meta.SetMetaFixed (ACMETA_MissileHeight, id);
 }
 
+//==========================================================================
+//
+//==========================================================================
+DEFINE_PROPERTY(pushfactor, F, Actor)
+{
+	PROP_FIXED_PARM(id, 0);
+	defaults->pushfactor = id;
+}
+
 //==========================================================================
 //
 //==========================================================================
diff --git a/wadsrc/static/actors/actor.txt b/wadsrc/static/actors/actor.txt
index 42aea63f68..c0f7b27408 100644
--- a/wadsrc/static/actors/actor.txt
+++ b/wadsrc/static/actors/actor.txt
@@ -17,6 +17,7 @@ ACTOR Actor native //: Thinker
 	BounceCount -1
 	FloatSpeed 4
 	Gravity 1
+	PushFactor 0.25
 
 	// Variables for the expression evaluator
 	// NOTE: fixed_t and angle_t are only used here to ensure proper conversion