diff --git a/core/Makefile b/core/Makefile
index eb439627..8b865555 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -82,7 +82,7 @@ ifeq "$(ENGINE)" "left4dead"
 	override ENGSET = true
 endif
 
-CFLAGS += -DSE_EPISODEONE=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 
 LINK += $(HL2LIB)/tier1_i486.a $(HL2LIB)/mathlib_i486.a vstdlib_i486.so \
 	tier0_i486.so -lpthread -static-libgcc
diff --git a/extensions/bintools/Makefile b/extensions/bintools/Makefile
index 04799a02..00c69967 100644
--- a/extensions/bintools/Makefile
+++ b/extensions/bintools/Makefile
@@ -71,8 +71,7 @@ ifeq "$(USEMETA)" "true"
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/tier0 -I$(HL2PUB)/tier1 \
 		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn \
 		-I$(SMSDK)/public/extensions -I$(SMSDK)/public/jit -I$(SMSDK)/public/jit/x86
-
-	CFLAGS += -DSE_EPISODEONE=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/extensions -I$(SMSDK)/public/jit \
 		-I$(SMSDK)/public/jit/x86 -I$(SMSDK)/public/sourcepawn
diff --git a/extensions/clientprefs/Makefile b/extensions/clientprefs/Makefile
index 623a665a..5a328309 100644
--- a/extensions/clientprefs/Makefile
+++ b/extensions/clientprefs/Makefile
@@ -68,8 +68,7 @@ ifeq "$(USEMETA)" "true"
 
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/tier0 -I$(HL2PUB)/tier1 \
 		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn 
-
-	CFLAGS += -DSE_EPISODEONE=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn -I$(SMSDK)/public/extensions \
 		-I$(MMSOURCE17)/core/sourcehook
diff --git a/extensions/cstrike/Makefile b/extensions/cstrike/Makefile
index 94628334..ca885f1d 100644
--- a/extensions/cstrike/Makefile
+++ b/extensions/cstrike/Makefile
@@ -69,8 +69,7 @@ ifeq "$(USEMETA)" "true"
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/tier0 -I$(HL2PUB)/tier1 \
 		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(SMSDK)/public -I$(SMSDK)/public/extensions \
 		-I$(SMSDK)/public/sourcepawn
-
-	CFLAGS += -DSE_EPISODEONE=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4 
+	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
 endif
diff --git a/extensions/curl/Makefile b/extensions/curl/Makefile
index 2579a8f7..fea9f3a1 100644
--- a/extensions/curl/Makefile
+++ b/extensions/curl/Makefile
@@ -70,8 +70,8 @@ ifeq "$(USEMETA)" "true"
 	LINK += $(LINK_HL2)
 
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/tier0 -I$(HL2PUB)/tier1 \
-		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn 
-	CFLAGS += -DSE_EPISODEONE=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
+	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
 endif
diff --git a/extensions/geoip/Makefile b/extensions/geoip/Makefile
index c37579eb..fcb25a56 100644
--- a/extensions/geoip/Makefile
+++ b/extensions/geoip/Makefile
@@ -68,8 +68,7 @@ ifeq "$(USEMETA)" "true"
 
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/tier0 -I$(HL2PUB)/tier1 \
 		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
-
-	CFLAGS += -DSE_EPISODEONE=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
 endif
diff --git a/extensions/mysql/Makefile b/extensions/mysql/Makefile
index 505fedfe..a1ee185a 100644
--- a/extensions/mysql/Makefile
+++ b/extensions/mysql/Makefile
@@ -75,8 +75,7 @@ ifeq "$(USEMETA)" "true"
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn -I$(MMSOURCE17)/core/sourcehook \
 		-I$(MYSQL)/include
-
-	CFLAGS += -DSE_EPISODEONE=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 endif
 
 LINK += $(MYSQL)/lib/libmysqlclient_r.a -lz -lpthread
diff --git a/extensions/regex/Makefile b/extensions/regex/Makefile
index 651ee39b..7f7aaa96 100644
--- a/extensions/regex/Makefile
+++ b/extensions/regex/Makefile
@@ -68,7 +68,7 @@ ifeq "$(USEMETA)" "true"
 
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/tier0 -I$(HL2PUB)/tier1 \
 		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
-	CFLAGS += -DSE_EPISODEONE=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn -I$(MMSOURCE17)/core/sourcehook
 endif
diff --git a/extensions/sdktools/Makefile b/extensions/sdktools/Makefile
index a57a76d8..1040f198 100644
--- a/extensions/sdktools/Makefile
+++ b/extensions/sdktools/Makefile
@@ -72,8 +72,7 @@ ifeq "$(USEMETA)" "true"
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/mathlib -I$(HL2PUB)/tier0 \
 		-I$(HL2PUB)/tier1 -I$(METAMOD) -I$(METAMOD)/sourcehook -I$(SMSDK)/public -I$(SMSDK)/public/extensions \
 		-I$(SMSDK)/public/sourcepawn
-
-	CFLAGS += -DSE_EPISODEONE=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
 endif
diff --git a/extensions/sqlite/Makefile b/extensions/sqlite/Makefile
index c78ecf47..c45c4633 100644
--- a/extensions/sqlite/Makefile
+++ b/extensions/sqlite/Makefile
@@ -88,7 +88,7 @@ ifeq "$(USEMETA)" "true"
 
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/tier0 -I$(HL2PUB)/tier1 \
 		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
-	CFLAGS += -DSE_EPISODEONE=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn -I$(MMSOURCE17)/core/sourcehook
 endif
diff --git a/extensions/structs/Makefile b/extensions/structs/Makefile
index 3e0a30e3..e6f0c039 100644
--- a/extensions/structs/Makefile
+++ b/extensions/structs/Makefile
@@ -67,8 +67,8 @@ ifeq "$(USEMETA)" "true"
 	LINK += $(LINK_HL2)
 
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/mathlib -I$(HL2PUB)/tier0 \
-		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(METAMOD)/sourcemm -I$(SMSDK)/public \
-	CFLAGS += -DSE_EPISODEONE=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(METAMOD)/sourcemm -I$(SMSDK)/public
+	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
 endif
diff --git a/extensions/tf2/Makefile b/extensions/tf2/Makefile
index 190aa257..30260c56 100644
--- a/extensions/tf2/Makefile
+++ b/extensions/tf2/Makefile
@@ -70,8 +70,7 @@ ifeq "$(USEMETA)" "true"
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/tier0 -I$(HL2PUB)/tier1 \
 		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(SMSDK)/public -I$(SMSDK)/public/extensions \
 		-I$(SMSDK)/public/sourcepawn
-
-	CFLAGS += -DSE_EPISODEONE=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
 endif
diff --git a/extensions/topmenus/Makefile b/extensions/topmenus/Makefile
index 3240d518..bbad5827 100644
--- a/extensions/topmenus/Makefile
+++ b/extensions/topmenus/Makefile
@@ -69,7 +69,7 @@ ifeq "$(USEMETA)" "true"
 
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/tier0 -I$(HL2PUB)/tier1 \
 		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
-	CFLAGS += -DSE_EPISODEONE=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn -I$(SMSDK)/public/extensions \
 		-I$(MMSOURCE17)/core/sourcehook
diff --git a/extensions/updater/Makefile b/extensions/updater/Makefile
index c4adab46..008608b7 100644
--- a/extensions/updater/Makefile
+++ b/extensions/updater/Makefile
@@ -73,7 +73,7 @@ ifeq "$(USEMETA)" "true"
 
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/tier0 -I$(HL2PUB)/tier1 \
 		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn 
-	CFLAGS += -DSE_EPISODEONE=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn \
 		-I$(SMSDK)/public/extensions
diff --git a/public/mms_sample_ext/Makefile b/public/mms_sample_ext/Makefile
index aa546120..b5b10304 100644
--- a/public/mms_sample_ext/Makefile
+++ b/public/mms_sample_ext/Makefile
@@ -58,7 +58,7 @@ ifeq "$(ENGINE)" "left4dead"
 	override ENGSET = true
 endif
 
-CFLAGS += -DSE_EPISODEONE=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 
 LINK = vstdlib_i486.so tier0_i486.so -m32 -ldl -lm
 
diff --git a/public/sample_ext/Makefile b/public/sample_ext/Makefile
index 78174cc8..7eff0a27 100644
--- a/public/sample_ext/Makefile
+++ b/public/sample_ext/Makefile
@@ -68,7 +68,7 @@ ifeq "$(USEMETA)" "true"
 
 	INCLUDE += -I. -I.. -Isdk -I$(HL2PUB) -I$(HL2PUB)/engine -I$(HL2PUB)/tier0 -I$(HL2PUB)/tier1 \
 		-I$(METAMOD) -I$(METAMOD)/sourcehook -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn 
-	CFLAGS += -DSE_EPISODEONE=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
+	CFLAGS += -DSE_EPISODEONE=1 -D_SE_DARKMESSIAH=2 -DSE_ORANGEBOX=3 -DSE_LEFT4DEAD=4
 else
 	INCLUDE += -I. -I.. -Isdk -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
 endif