diff --git a/core/smn_halflife.cpp b/core/smn_halflife.cpp
index 73091109..2b8adc9c 100644
--- a/core/smn_halflife.cpp
+++ b/core/smn_halflife.cpp
@@ -436,6 +436,37 @@ static cell_t smn_IsPlayerAlive(IPluginContext *pContext, const cell_t *params)
 	}
 }
 
+static cell_t GuessSDKVersion(IPluginContext *pContext, const cell_t *params)
+{
+#if defined METAMOD_PLAPI_VERSION
+	int version = g_SMAPI->GetSourceEngineBuild();
+
+	if (version == SOURCE_ENGINE_ORIGINAL)
+	{
+		return 10;
+	}
+	else if (version == SOURCE_ENGINE_EPISODEONE)
+	{
+		return 20;
+	}
+	else if (version == SOURCE_ENGINE_ORANGEBOX)
+	{
+		return 30;
+	}
+#else
+	if (g_HL2.IsOriginalEngine())
+	{
+		return 10;
+	}
+	else
+	{
+		return 20;
+	}
+#endif
+
+	return 0;
+}
+
 REGISTER_NATIVES(halflifeNatives)
 {
 	{"CreateFakeClient",		CreateFakeClient},
@@ -465,5 +496,6 @@ REGISTER_NATIVES(halflifeNatives)
 	{"PrintHintText",			PrintHintText},
 	{"ShowVGUIPanel",			ShowVGUIPanel},
 	{"IsPlayerAlive",			smn_IsPlayerAlive},
+	{"GuessSDKVersion",			GuessSDKVersion},
 	{NULL,						NULL},
 };
diff --git a/plugins/basefuncommands/ice.sp b/plugins/basefuncommands/ice.sp
index 11afbcbb..fcd06084 100644
--- a/plugins/basefuncommands/ice.sp
+++ b/plugins/basefuncommands/ice.sp
@@ -59,7 +59,7 @@ FreezeClient(client, time)
 		UnfreezeClient(client);
 	}
 	
-	SetEntityMovetype(client, MOVETYPE_NONE);
+	SetEntityMoveType(client, MOVETYPE_NONE);
 	SetEntityRenderColor(client, 0, 128, 255, 192);
 	
 	new Float:vec[3];
@@ -81,7 +81,7 @@ UnfreezeClient(client)
 	GetClientEyePosition(client, vec);
 	EmitAmbientSound(SOUND_FREEZE, vec, client, SNDLEVEL_RAIDSIREN);
 
-	SetEntityMovetype(client, MOVETYPE_WALK);
+	SetEntityMoveType(client, MOVETYPE_WALK);
 	SetEntityRenderColor(client, 255, 255, 255, 255);	
 }
 
@@ -191,7 +191,7 @@ public Action:Timer_Freeze(Handle:timer, any:client)
 	
 	g_FreezeTracker[client]--;
 	
-	SetEntityMovetype(client, MOVETYPE_NONE);
+	SetEntityMoveType(client, MOVETYPE_NONE);
 	SetEntityRenderColor(client, 0, 128, 255, 135);
 	
 	new Float:vec[3];
diff --git a/plugins/basefuncommands/noclip.sp b/plugins/basefuncommands/noclip.sp
index 22a074af..d4732faa 100644
--- a/plugins/basefuncommands/noclip.sp
+++ b/plugins/basefuncommands/noclip.sp
@@ -38,15 +38,15 @@ SetupNoClip()
 
 PerformNoClip(client, target)
 {
-	new movetype = GetEntityMovetype(target);
-	PrintToChatAll("movetype was %d", movetype);
+	new MoveType:movetype = GetEntityMoveType(target);
+
 	if (movetype != MOVETYPE_NOCLIP)
 	{
-		SetEntityMovetype(target, MOVETYPE_NOCLIP);
+		SetEntityMoveType(target, MOVETYPE_NOCLIP);
 	}
 	else
 	{
-		SetEntityMovetype(target, MOVETYPE_WALK);
+		SetEntityMoveType(target, MOVETYPE_WALK);
 	}
 	
 	LogAction(client, target, "\"%L\" toggled noclip on \"%L\"", client, target);
diff --git a/plugins/include/entity.inc b/plugins/include/entity.inc
index 90830111..d3f3a33a 100644
--- a/plugins/include/entity.inc
+++ b/plugins/include/entity.inc
@@ -217,7 +217,7 @@ native GetEntData(entity, offset, size=4);
  * @error				Invalid entity or offset out of reasonable bounds.
  * @noreturn
  */
-native SetEntData(entity, offset, value, size=4, bool:changeState=false);
+native SetEntData(entity, offset, any:value, size=4, bool:changeState=false);
 
 /**
  * Peeks into an entity's object data and retrieves the float value at 
@@ -414,7 +414,7 @@ stock GetEntProp(entity, PropType:type, const String:prop[], size=4)
  * @error				Invalid entity or offset out of reasonable bounds.
  * @noreturn
  */
-stock SetEntProp(entity, PropType:type, const String:prop[], value, size=4)
+stock SetEntProp(entity, PropType:type, const String:prop[], any:value, size=4)
 {
 	new offs;
 
diff --git a/plugins/include/entity_prop_stocks.inc b/plugins/include/entity_prop_stocks.inc
index 0bc4a1fd..ab492494 100644
--- a/plugins/include/entity_prop_stocks.inc
+++ b/plugins/include/entity_prop_stocks.inc
@@ -35,20 +35,65 @@
 #endif
 #define _entity_prop_stocks_included
 
-enum
+enum MoveType
 {
-	MOVETYPE_NONE = 0,			/** never moves */
-	MOVETYPE_ISOMETRIC,			/** For players */
-	MOVETYPE_WALK,				/** Player only - moving on the ground */
-	MOVETYPE_STEP,				/** gravity, special edge handling -- monsters use this */
-	MOVETYPE_FLY,				/** No gravity, but still collides with stuff */
-	MOVETYPE_FLYGRAVITY,			/** flies through the air + is affected by gravity */
-	MOVETYPE_VPHYSICS,			/** uses VPHYSICS for simulation */
-	MOVETYPE_PUSH,				/** no clip to world, push and crush */
-	MOVETYPE_NOCLIP,			/** No gravity, no collisions, still do velocity/avelocity */
-	MOVETYPE_LADDER,			/** Used by players only when going onto a ladder */
-	MOVETYPE_OBSERVER,			/** Observer movement, depends on player's observer mode */
-	MOVETYPE_CUSTOM,			/** Allows the entity to describe its own physics */
+	MOVETYPE_NONE = 0,			/**< never moves */
+	MOVETYPE_ISOMETRIC,			/**< For players */
+	MOVETYPE_WALK,				/**< Player only - moving on the ground */
+	MOVETYPE_STEP,				/**< gravity, special edge handling -- monsters use this */
+	MOVETYPE_FLY,				/**< No gravity, but still collides with stuff */
+	MOVETYPE_FLYGRAVITY,		/**< flies through the air + is affected by gravity */
+	MOVETYPE_VPHYSICS,			/**< uses VPHYSICS for simulation */
+	MOVETYPE_PUSH,				/**< no clip to world, push and crush */
+	MOVETYPE_NOCLIP,			/**< No gravity, no collisions, still do velocity/avelocity */
+	MOVETYPE_LADDER,			/**< Used by players only when going onto a ladder */
+	MOVETYPE_OBSERVER,			/**< Observer movement, depends on player's observer mode */
+	MOVETYPE_CUSTOM,			/**< Allows the entity to describe its own physics */
+};
+
+enum RenderMode
+{	
+	RENDER_NORMAL,			/**< src */
+	RENDER_TRANSCOLOR,		/**< c*a+dest*(1-a) */
+	RENDER_TRANSTEXTURE,	/**< src*a+dest*(1-a) */
+	RENDER_GLOW,			/**< src*a+dest -- No Z buffer checks -- Fixed size in screen space */
+	RENDER_TRANSALPHA,		/**< src*srca+dest*(1-srca) */
+	RENDER_TRANSADD,		/**< src*a+dest */
+	RENDER_ENVIRONMENTAL,	/**< not drawn, used for environmental effects */
+	RENDER_TRANSADDFRAMEBLEND, /**< use a fractional frame value to blend between animation frames */
+	RENDER_TRANSALPHAADD,	/**< src + dest*(1-a) */
+	RENDER_WORLDGLOW,		/**< Same as kRenderGlow but not fixed size in screen space */
+	RENDER_NONE,			/**< Don't render. */
+};
+
+enum RenderFx
+{	
+	RENDERFX_NONE = 0, 
+	RENDERFX_PULSE_SLOW, 
+	RENDERFX_PULSE_FAST, 
+	RENDERFX_PULSE_SLOW_WIDE, 
+	RENDERFX_PULSE_FAST_WIDE, 
+	RENDERFX_FADE_SLOW, 
+	RENDERFX_FADE_FAST, 
+	RENDERFX_SOLID_SLOW, 
+	RENDERFX_SOLID_FAST, 	   
+	RENDERFX_STROBE_SLOW, 
+	RENDERFX_STROBE_FAST, 
+	RENDERFX_STROBE_FASTER, 
+	RENDERFX_FLICKER_SLOW, 
+	RENDERFX_FLICKER_FAST,
+	RENDERFX_NO_DISSIPATION,
+	RENDERFX_DISTORT,			/**< Distort/scale/translate flicker */
+	RENDERFX_HOLOGRAM,			/**< kRenderFxDistort + distance fade */
+	RENDERFX_EXPLODE,			/**< Scale up really big! */
+	RENDERFX_GLOWSHELL,			/**< Glowing Shell */
+	RENDERFX_CLAMP_MIN_SCALE,	/**< Keep this sprite from getting very small (SPRITES only!) */
+	RENDERFX_ENV_RAIN,			/**< for environmental rendermode, make rain */
+	RENDERFX_ENV_SNOW,			/**<  "        "            "    , make snow */
+	RENDERFX_SPOTLIGHT,			/**< TEST CODE for experimental spotlight */
+	RENDERFX_RAGDOLL,			/**< HACKHACK: TEST CODE for signalling death of a ragdoll character */
+	RENDERFX_PULSE_FAST_WIDER,
+	RENDERFX_MAX
 };
 
 #define IN_ATTACK		(1 << 0)
@@ -84,10 +129,10 @@ enum
  * @return			Movetype, see enum above.
  * @error			Invalid entity index, or lack of mod compliance.
  */
-stock GetEntityMovetype(entity)
+stock MoveType:GetEntityMoveType(entity)
 {
 	new offset = GetEntSendPropOffs(entity, "movetype");
-	return GetEntData(entity, offset, 1);
+	return MoveType:GetEntData(entity, offset, 1);
 }
 
 /**
@@ -98,12 +143,62 @@ stock GetEntityMovetype(entity)
  * @noreturn
  * @error			Invalid entity index, or lack of mod compliance.
  */
-stock SetEntityMovetype(entity, mt)
+stock SetEntityMoveType(entity, MoveType:mt)
 {
 	new offset = GetEntSendPropOffs(entity, "movetype");
 	SetEntData(entity, offset, mt, 1, true);
 }
 
+/**
+ * Gets an entity's render mode.
+ *
+ * @param entity	Entity index.
+ * @return			RenderMode value.
+ * @error			Invalid entity index, or lack of mod compliance.
+ */
+stock RenderMode:GetEntityRenderMode(entity)
+{
+	return RenderMode:GetEntProp(entity, Prop_Send, "m_nRenderMode", 1);
+}
+
+/**
+ * Sets an entity's render mode.
+ *
+ * @param entity	Entity index.
+ * @param mode		RenderMode value.
+ * @noreturn
+ * @error			Invalid entity index, or lack of mod compliance.
+ */
+stock SetEntityRenderMode(entity, RenderMode:mode)
+{
+	SetEntProp(entity, Prop_Send, "m_nRenderMode", mode, 1);
+}
+
+/**
+ * Gets an entity's render Fx.
+ *
+ * @param entity	Entity index.
+ * @return			RenderFx value.
+ * @error			Invalid entity index, or lack of mod compliance.
+ */
+stock RenderFx:GetEntityRenderFx(entity)
+{
+	return RenderFx:GetEntProp(entity, Prop_Send, "m_nRenderFX", 1);
+}
+
+/**
+ * Sets an entity's render Fx.
+ *
+ * @param entity	Entity index.
+ * @param fx		RenderFx value.
+ * @noreturn
+ * @error			Invalid entity index, or lack of mod compliance.
+ */
+stock SetEntityRenderFx(entity, RenderFx:fx)
+{
+	SetEntProp(entity, Prop_Send, "m_nRenderFX", fx, 1);
+}
+
 /**
  * Sets an entity's color.
  *
@@ -124,6 +219,8 @@ stock SetEntityRenderColor(entity, r=255, g=255, b=255, a=255)
 	SetEntData(entity, offset + 3, a, 1, true);
 }
 
+/* GuessSDKVersion */
+
 /**
  * Gets an entity's gravity.
  *
@@ -175,3 +272,14 @@ stock GetClientButtons(client)
 	return GetEntProp(client, Prop_Data, "m_nButtons");
 }
 
+#pragma deprecated Case change, use MoveType version
+stock SetEntityMovetype(entity, any:mt)
+{
+	SetEntityMoveType(entity, MoveType:mt);
+}
+
+#pragma deprecated Case change, use MoveType version
+stock GetEntityMovetype(entity)
+{
+	return _:GetEntityMoveType(entity);
+}
diff --git a/plugins/include/halflife.inc b/plugins/include/halflife.inc
index 58e3b37a..c9f1fbba 100644
--- a/plugins/include/halflife.inc
+++ b/plugins/include/halflife.inc
@@ -35,8 +35,13 @@
 #endif
 #define _halflife_included
 
+#define SOURCE_SDK_UNKNOWN			0		/**< Could not determine the engine version */
+#define SOURCE_SDK_ORIGINAL			10		/**< Original Source engine (still used by "The Ship") */
+#define SOURCE_SDK_EPISODE1			20		/**< SDK+Engine released after Episode 1 */
+#define SOURCE_SDK_EPISODE2			30		/**< Engine released after Episode 2 (no SDK yet) */
+
 #define MOTDPANEL_TYPE_TEXT		0	/**< Treat msg as plain text */
-#define MOTDPANEL_TYPE_INDEX		1	/**< Msg is auto determined by the engine */
+#define MOTDPANEL_TYPE_INDEX	1	/**< Msg is auto determined by the engine */
 #define MOTDPANEL_TYPE_URL		2	/**< Treat msg as an URL link */
 #define MOTDPANEL_TYPE_FILE		3	/**< Treat msg as a filename to be openned */
 
@@ -231,6 +236,17 @@ native bool:IsSoundPrecached(const String:sound[]);
  */
 native CreateDialog(client, Handle:kv, DialogType:type);
 
+/**
+ * Guesses the SDK version a mod was compiled against.  If nothing 
+ * specific is known about the game, the engine version is used instead.
+ *
+ * The return values are guaranteed to increase chronologically (that is, 
+ * a later release will have a higher value).
+ *
+ * @return				SOURCE_SDK version code.
+ */
+native GuessSDKVersion();
+
 /**
  * Prints a message to a specific client in the chat area.
  *