MetaMod:Source 1.11 Now Stable!

Nov 2, 2020
The MetaMod:Source 1.11 branch has now been declared the new stable branch. This is mostly a maintenance release with under the hood changes. There are no new features beyond additional game support. Users have been using MM:S on those games for years now in some cases. Below is a list of what's new in the 1.11 branch compared to 1.10.


  • Fixed linking errors with some compilers when MM:S plugins call functions in tier1 interface.h
  • Added support for the following engine variants: Source SDK 2013, Blade Symphony, Insurgency, Contagion, Black Mesa, and Day of Infamy.
  • Updated Dota 2 support for the move to Source 2 from Source. (Currently broken due to other game changes since then).
  • Added 64-bit support for games with supported 64-bit dedicated server versions, including 64-bit support in SourceHook.
  • Ported Episode 1 build from Core Legacy API to Core API.
  • Removed support for plugins using the "Core Legacy" API.
  • Updated AMBuild dependency to version 2.2.
The Stable Builds download page now points to 1.11 builds, although 1.10 ones are still available and linked here for the moment. The Dev Builds page now points to the brand new 1.12 branch.

Move to Rolling Release Model

Apr 27, 2017
Metamod:Source, like SourceMod, is now officially on a rolling release cycle.

What this means to you
There won't be any more "point" releases (1.10.7, etc). Instead, we're going to continue to make an effort to keep the stable branch stable, and better relay information about what has changed in each build.

Major releases with potential API breakage will still occur and will still have release notes, along with continued updates even after the branch is considered to be stable.

Some of the recent, potentially-breaking changes in the Dev branch include support for Source 2, support for 64-bit dedicated servers, and removal of the old v1.4 "ep1" plugin API. (The newer v1.6 API is now used for The Ship and Source SDK 2006 mods).

The old Downloads and Snapshots pages have been merged and now contain more useful information than before. There are immediate links at the top to download the latest build for your OS, as well as other recent builds displayed below with information about the changes in that build over the previous one. We may still need to sort out some small things, but most everything is in place now. If you come across any issues with these changes, please post a comment in the forum.