diff --git a/loader/loader.cpp b/loader/loader.cpp
index 5616171..f57283e 100644
--- a/loader/loader.cpp
+++ b/loader/loader.cpp
@@ -389,6 +389,12 @@ mm_DetermineBackendS1(QueryValveInterface engineFactory, QueryValveInterface ser
 					{
 						return MMBackend_Mock;
 					}
+					else if (serverFactory("ServerGameClients005", NULL) != nullptr)
+					{
+						// 2025 version of SDK 2013, or maybe hl1mp, or anything else shaped like those.
+						// We may later make a separate SDK for this branch. For now, they match, we'll hack it
+						return MMBackend_HL2DM;
+					}
 					else
 					{
 						return MMBackend_SDK2013;