diff --git a/AMBuildScript b/AMBuildScript
index e285540..5ec06eb 100644
--- a/AMBuildScript
+++ b/AMBuildScript
@@ -48,11 +48,12 @@ PossibleSDKs = {
   'swarm':  SDK('HL2SDK-SWARM', '2.swarm', '16', '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', '20', 'CSGO', WinLinuxMac, 'csgo'),
-  'dota': SDK('HL2SDKDOTA', '2.dota', '21', 'DOTA', Source2, 'dota'),
+  'csgo': SDK('HL2SDKCSGO', '2.csgo', '21', 'CSGO', WinLinuxMac, 'csgo'),
+  'dota': SDK('HL2SDKDOTA', '2.dota', '22', 'DOTA', Source2, 'dota'),
   'portal2':  SDK('HL2SDKPORTAL2', '2.portal2', '17', 'PORTAL2', [], 'portal2'),
   'blade':  SDK('HL2SDKBLADE', '2.blade', '18', 'BLADE', WinLinux, 'blade'),
   'insurgency':  SDK('HL2SDKINSURGENCY', '2.insurgency', '19', 'INSURGENCY', WinLinuxMac, 'insurgency'),
+  'doi':  SDK('HL2SDKDOI', '2.doi', '20', 'DOI', WinLinuxMac, 'doi'),
   'contagion':  SDK('HL2SDKCONTAGION', '2.contagion', '14', 'CONTAGION', WinOnly, 'contagion'),
   'bms':  SDK('HL2SDKBMS', '2.bms', '10', 'BMS', WinLinux, 'bms'),
 }
@@ -400,7 +401,7 @@ class MMSConfig(object):
       else:
         compiler.postlink += [compiler.Dep(os.path.join(lib_folder, 'tier1_i486.a'))]
 
-      if sdk.name in ['blade', 'insurgency', 'csgo', 'dota']:
+      if sdk.name in ['blade', 'insurgency', 'doi', 'csgo', 'dota']:
         compiler.postlink += [compiler.Dep(os.path.join(lib_folder, 'interfaces_i486.a'))]
 
     binary = self.LibraryBuilder(compiler, name)
@@ -408,9 +409,9 @@ class MMSConfig(object):
     dynamic_libs = []
     if builder.target.platform == 'linux':
       compiler.linkflags[0:0] = ['-lm']
-      if sdk.name in ['css', 'hl2dm', 'dods', 'tf2', 'sdk2013', 'bms', 'nucleardawn', 'l4d2', 'insurgency']:
+      if sdk.name in ['css', 'hl2dm', 'dods', 'tf2', 'sdk2013', 'bms', 'nucleardawn', 'l4d2', 'insurgency', 'doi']:
         dynamic_libs = ['libtier0_srv.so', 'libvstdlib_srv.so']
-      elif sdk.name in ['l4d', 'blade', 'insurgency', 'csgo', 'dota']:
+      elif sdk.name in ['l4d', 'blade', 'insurgency', 'doi', 'csgo', 'dota']:
         dynamic_libs = ['libtier0.so', 'libvstdlib.so']
       else:
         dynamic_libs = ['tier0_i486.so', 'vstdlib_i486.so']
@@ -419,7 +420,7 @@ class MMSConfig(object):
       dynamic_libs = ['libtier0.dylib', 'libvstdlib.dylib']
     elif builder.target.platform == 'windows':
       libs = ['tier0', 'tier1', 'vstdlib']
-      if sdk.name in ['swarm', 'blade', 'insurgency', 'csgo', 'dota']:
+      if sdk.name in ['swarm', 'blade', 'insurgency', 'doi', 'csgo', 'dota']:
         libs.append('interfaces')
       for lib in libs:
         if builder.target.arch == 'x86':
diff --git a/core/ISmmPluginExt.h b/core/ISmmPluginExt.h
index 6284b00..9cb4b8c 100644
--- a/core/ISmmPluginExt.h
+++ b/core/ISmmPluginExt.h
@@ -59,6 +59,7 @@
 #define SOURCE_ENGINE_INSURGENCY		21				/**< Insurgency */
 #define SOURCE_ENGINE_CONTAGION			22				/**< Contagion */
 #define SOURCE_ENGINE_BMS				23				/**< Black Mesa Multiplayer */
+#define SOURCE_ENGINE_DOI				24				/**< Day of Infamy */
 
 #define METAMOD_PLAPI_VERSION			16				/**< Version of this header file */
 #define METAMOD_PLAPI_NAME				"ISmmPlugin"	/**< Name of the plugin interface */
diff --git a/core/provider/provider_ep2.cpp b/core/provider/provider_ep2.cpp
index 54b447c..445f503 100644
--- a/core/provider/provider_ep2.cpp
+++ b/core/provider/provider_ep2.cpp
@@ -530,6 +530,8 @@ int BaseProvider::DetermineSourceEngine()
 	return SOURCE_ENGINE_BLADE;
 #elif SOURCE_ENGINE == SE_INSURGENCY
 	return SOURCE_ENGINE_INSURGENCY;
+#elif SOURCE_ENGINE == SE_DOI
+	return SOURCE_ENGINE_DOI;
 #elif SOURCE_ENGINE == SE_CSGO
 	return SOURCE_ENGINE_CSGO;
 #elif SOURCE_ENGINE == SE_DOTA
@@ -654,6 +656,8 @@ const char *BaseProvider::GetEngineDescription() const
 	return "Blade Symphony (2013)";
 #elif SOURCE_ENGINE == SE_INSURGENCY
 	return "Insurgency (2013)";
+#elif SOURCE_ENGINE == SE_DOI
+	return "Day of Infamy (2016)";
 #elif SOURCE_ENGINE == SE_CSGO
 	return "Counter-Strike: Global Offensive (2012)";
 #elif SOURCE_ENGINE == SE_DOTA
diff --git a/loader/loader.cpp b/loader/loader.cpp
index f16b733..e03d3d4 100644
--- a/loader/loader.cpp
+++ b/loader/loader.cpp
@@ -90,6 +90,7 @@ static const char *backend_names[] =
 	"2.insurgency",
 	"2.contagion",
 	"2.bms",
+	"2.doi",
 };
 
 #if defined _WIN32
@@ -307,6 +308,14 @@ mm_DetermineBackend(QueryValveInterface engineFactory, QueryValveInterface serve
 
 		if (engineFactory("IEngineSoundServer004", NULL) != NULL)
 		{
+			void *lib = (void *)serverFactory;
+			void *addr;
+			if (strcmp(game_name, "doi") == 0
+				|| (addr = mm_FindPattern(lib, "doi_gamerules_data", sizeof("doi_gamerules_data") - 1)))
+			{
+				return MMBackend_DOI;
+			}
+			
 			return MMBackend_Insurgency;
 		}
 		
diff --git a/loader/loader.h b/loader/loader.h
index 9134217..ca2e01d 100644
--- a/loader/loader.h
+++ b/loader/loader.h
@@ -102,6 +102,7 @@ enum MetamodBackend
 	MMBackend_Insurgency,
 	MMBackend_Contagion,
 	MMBackend_BMS,
+	MMBackend_DOI,
 
 	MMBackend_UNKNOWN
 };
diff --git a/loader/serverplugin.cpp b/loader/serverplugin.cpp
index 2db2435..9daff26 100644
--- a/loader/serverplugin.cpp
+++ b/loader/serverplugin.cpp
@@ -135,6 +135,7 @@ public:
 			&& mm_backend != MMBackend_Portal2
 			&& mm_backend != MMBackend_Blade
 			&& mm_backend != MMBackend_Insurgency
+			&& mm_backend != MMBackend_DOI
 			&& mm_backend != MMBackend_CSGO
 			&& mm_backend != MMBackend_DOTA)
 		{