diff --git a/core/logic/ExtensionSys.cpp b/core/logic/ExtensionSys.cpp
index 61989e5a..05b46296 100644
--- a/core/logic/ExtensionSys.cpp
+++ b/core/logic/ExtensionSys.cpp
@@ -101,6 +101,19 @@ CLocalExtension::CLocalExtension(const char *filename)
 			goto found;
 		}
 	}
+	else if (strcmp(smcore.gamesuffix, "2.nd") == 0)
+	{
+		g_pSM->BuildPath(Path_SM,
+			path,
+			PLATFORM_MAX_PATH,
+			"extensions/%s.2.l4d2." PLATFORM_LIB_EXT,
+			filename);
+
+		if (libsys->IsPathFile(path))
+		{
+			goto found;
+		}
+	}
 
 	/* First see if there is an engine specific build! */
 	g_pSM->BuildPath(Path_SM, 
diff --git a/core/logic/GameConfigs.cpp b/core/logic/GameConfigs.cpp
index 2cd305f2..dfab6bbe 100644
--- a/core/logic/GameConfigs.cpp
+++ b/core/logic/GameConfigs.cpp
@@ -133,6 +133,8 @@ CGameConfig::CGameConfig(const char *file, const char *engine)
 
 	if (strcmp(m_pEngine, "css") == 0 || strcmp(m_pEngine, "dods") == 0 || strcmp(m_pEngine, "hl2dm") == 0 || strcmp(m_pEngine, "tf2") == 0)
 		this->SetBaseEngine("orangebox_valve");
+	else if (strcmp(m_pEngine, "nucleardawn"))
+		this->SetBaseEngine("left4dead2");
 	else
 		this->SetBaseEngine(NULL);
 }