diff --git a/AMBuildScript b/AMBuildScript
index eaae52d..607e4d2 100644
--- a/AMBuildScript
+++ b/AMBuildScript
@@ -30,16 +30,17 @@ PossibleSDKs = {
   'tf2':  SDK('HL2SDKTF2', '2.tf2', '10', 'TF2', WinLinuxMac, 'tf2'),
   'l4d':  SDK('HL2SDKL4D', '2.l4d', '11', 'LEFT4DEAD', WinLinuxMac, 'l4d'),
   'nd': SDK('HL2SDKND', '2.nd', '12', 'NUCLEARDAWN', WinLinuxMac, 'nd'),
-  'l4d2': SDK('HL2SDKL4D2', '2.l4d2', '13', 'LEFT4DEAD2', WinLinuxMac, 'l4d2'),
+  'l4d2': SDK('HL2SDKL4D2', '2.l4d2', '14', 'LEFT4DEAD2', WinLinuxMac, 'l4d2'),
   'darkm':  SDK('HL2SDK-DARKM', '2.darkm', '2', 'DARKMESSIAH', WinOnly, 'darkm'),
-  'swarm':  SDK('HL2SDK-SWARM', '2.swarm', '14', 'ALIENSWARM', WinOnly, 'swarm'),
+  'swarm':  SDK('HL2SDK-SWARM', '2.swarm', '15', 'ALIENSWARM', WinOnly, 'swarm'),
   'bgt':  SDK('HL2SDK-BGT', '2.bgt', '4', 'BLOODYGOODTIME', WinOnly, 'bgt'),
   'eye':  SDK('HL2SDK-EYE', '2.eye', '5', 'EYE', WinOnly, 'eye'),
-  'csgo': SDK('HL2SDKCSGO', '2.csgo', '18', 'CSGO', WinLinuxMac, 'csgo'),
-  'dota': SDK('HL2SDKDOTA', '2.dota', '19', 'DOTA', WinLinuxMac, 'dota'),
-  'portal2':  SDK('HL2SDKPORTAL2', '2.portal2', '15', 'PORTAL2', [], 'portal2'),
-  'blade':  SDK('HL2SDKBLADE', '2.blade', '16', 'BLADE', WinLinux, 'blade'),
-  'insurgency':  SDK('HL2SDKINSURGENCY', '2.insurgency', '17', 'INSURGENCY', WinLinuxMac, 'insurgency'),
+  'csgo': SDK('HL2SDKCSGO', '2.csgo', '19', 'CSGO', WinLinuxMac, 'csgo'),
+  'dota': SDK('HL2SDKDOTA', '2.dota', '20', 'DOTA', WinLinuxMac, 'dota'),
+  'portal2':  SDK('HL2SDKPORTAL2', '2.portal2', '16', 'PORTAL2', [], 'portal2'),
+  'blade':  SDK('HL2SDKBLADE', '2.blade', '17', 'BLADE', WinLinux, 'blade'),
+  'insurgency':  SDK('HL2SDKINSURGENCY', '2.insurgency', '18', 'INSURGENCY', WinLinuxMac, 'insurgency'),
+  'contagion':  SDK('HL2SDKCONTAGION', '2.contagion', '13', 'CONTAGION', WinOnly, 'contagion'),
 }
 
 def ResolveEnvPath(env, folder):
diff --git a/core/ISmmPluginExt.h b/core/ISmmPluginExt.h
index 720ee93..7d17c4a 100644
--- a/core/ISmmPluginExt.h
+++ b/core/ISmmPluginExt.h
@@ -64,6 +64,7 @@ enum
 #define SOURCE_ENGINE_SDK2013			19				/**< Source SDK 2013 */
 #define SOURCE_ENGINE_BLADE				20				/**< Blade Symphony */
 #define SOURCE_ENGINE_INSURGENCY		21				/**< Insurgency */
+#define SOURCE_ENGINE_CONTAGION			22				/**< Contagion */
 
 #define METAMOD_PLAPI_VERSION			15				/**< Version of this header file */
 #define METAMOD_PLAPI_NAME				"ISmmPlugin"	/**< Name of the plugin interface */
diff --git a/core/metamod_console.cpp b/core/metamod_console.cpp
index b52b96b..bdedd8f 100644
--- a/core/metamod_console.cpp
+++ b/core/metamod_console.cpp
@@ -120,6 +120,8 @@ bool Command_Meta(IMetamodSourceCommandInfo *info)
 			CONMSG("  Engine: Left 4 Dead 2 (2009)\n");
 #elif SOURCE_ENGINE == SE_NUCLEARDAWN
 			CONMSG("  Engine: Nuclear Dawn (2011)\n");
+#elif SOURCE_ENGINE == SE_CONTAGION
+			CONMSG("  Engine: Contagion (2013)\n");
 #elif SOURCE_ENGINE == SE_LEFT4DEAD
 			CONMSG("  Engine: Left 4 Dead (2008)\n");
 #elif SOURCE_ENGINE == SE_ORANGEBOX
diff --git a/core/provider/provider_ep2.cpp b/core/provider/provider_ep2.cpp
index 373be3f..61fe84e 100644
--- a/core/provider/provider_ep2.cpp
+++ b/core/provider/provider_ep2.cpp
@@ -379,6 +379,8 @@ int BaseProvider::DetermineSourceEngine(const char *game)
 	return SOURCE_ENGINE_LEFT4DEAD2;
 #elif SOURCE_ENGINE == SE_NUCLEARDAWN
 	return SOURCE_ENGINE_NUCLEARDAWN;
+#elif SOURCE_ENGINE == SE_CONTAGION
+	return SOURCE_ENGINE_CONTAGION;
 #elif SOURCE_ENGINE == SE_LEFT4DEAD
 	return SOURCE_ENGINE_LEFT4DEAD;
 #elif SOURCE_ENGINE == SE_ORANGEBOX
diff --git a/loader/loader.cpp b/loader/loader.cpp
index 8850a7f..d46f63e 100644
--- a/loader/loader.cpp
+++ b/loader/loader.cpp
@@ -88,6 +88,7 @@ static const char *backend_names[] =
 	"2.sdk2013",
 	"2.blade",
 	"2.insurgency",
+	"2.contagion",
 };
 
 #if defined _WIN32
@@ -307,6 +308,10 @@ mm_DetermineBackend(QueryValveInterface engineFactory, QueryValveInterface serve
 			{
 				return MMBackend_NuclearDawn;
 			}
+			else if (strcmp(game_name, "contagion") == 0)
+			{
+				return MMBackend_Contagion;
+			}
 			else
 			{
 				return MMBackend_Left4Dead2;
diff --git a/loader/loader.h b/loader/loader.h
index a39bd23..a96c88c 100644
--- a/loader/loader.h
+++ b/loader/loader.h
@@ -100,6 +100,7 @@ enum MetamodBackend
 	MMBackend_SDK2013,
 	MMBackend_Blade,
 	MMBackend_Insurgency,
+	MMBackend_Contagion,
 
 	MMBackend_UNKNOWN
 };