This game has been Greenlit by the Community!

The community has shown their interest in this game. Valve has reached out to this developer to start moving things toward release on Steam.

Operation Black Mesa
Platforms: PC, Mac, Linux
Languages: English, Czech, German, Russian
Mar 22, 2013 @ 2:15pm
Apr 12 @ 12:42pm
Recent Announcements View All (10)
2014 Kickoff Update
  • Multiplayer Beta Release Q1 Cancelled
  • Multiplayer Progress
  • Singleplayer Campaign, Guard Duty
  • OBM: The Video Game?

Thanks for your support!
Tripmine Dev Team

Website down
Operation Black Mesa (Opposing force: Source)

Operation Black Mesa is a total remake of Half-Life: Opposing Force. Utilizing the Source engine, Tripmine Studios plans to recreate the Black Mesa Research Facility from the ground up, as seen by the protagonist, Adrian Shephard.

-Mod DB – Top Unreleased Mod for 2007 (5th place)
-Mod DB – Honorable mention for Top Unreleased Mod of 2009
-Mod DB - Mod of the year 2010 - Players Choice (3rd Place)
-Mod DB – Honorable mention for Top Unreleased Mod of 2011
-Mod DB – Best unreleased Mod of 2013

This project is not related to the Black Mesa project, a remake of the original Half-Life. For more details, please read FAQ at our website:


VALVe software originally had plans to port Half-Life: Opposing Force into the Source engine (announced at E3 2004) much like Half-Life: Source. However, seeing the results of Half-Life: Source, we decided to take the task into our own hands.
If we manage to get our game on Steam, it won’t only bring in the advantages in form of SteamWorks implementation, easy installation and automatic updates, but also will help to make the community around the game much bigger. That will bring many advantages, including populated servers in the multiplayer. While on Steam, the game would be available up to 50 milion customers using the Steam services!

Planned Features
• As a total conversion mod, Operation Black Mesa aims to be composed custom content entirely.
• All original maps re-created and re-envisioned for better realism and gameplay.
• Some maps are enlarged / extended to create a more lengthy and immersive experience.
• Improved AI, making enemies smarter and combat more dynamic.
• More enemy encounters to keep the action fresh.
• Scripted scenes with all the original Opposing Force characters to help bring the story to life.
• Textures and models pushing the limits of the Source engine, to bring you as much artistic detail as possible.
• New voice acting, new sound assets and a new soundtrack.
• Multiplayer that will bring back the classic gameplay, but also many new features, maps and game modes!
Popular Discussions View All (53)
Apr 24 @ 8:09pm
Sharky McOmNom
Apr 21 @ 5:44am
If you can add any weapon in the game...
Apr 24 @ 10:33am
< >
WELSH_BOI_99 Apr 25 @ 3:27am 
Cannot wait this is gping to be amazing
Hardstyle Apr 24 @ 10:55am 
I think, this game will NEVER come to Steam... its simple. This game is better, then the "Valve Crap", and valve dont want, better games.
_-CRAZYMUFFIN-_ Apr 23 @ 3:15pm 
My fav game havving a source remake?

Kill me now.
Chumbuster Apr 20 @ 3:52pm 
I would say if we're lucky, the game will come with black mesa, both released together in one awesome package.
Oscar PLACKER Apr 19 @ 6:07am 
como lo descargo??
Wh!te Apr 17 @ 11:12am 
I wait for that game 1 year Black Mesa to
DrFunnyFun Apr 16 @ 12:43pm 
Collaborate with the black mesa team and you'll go faster in development! (just an idea)
Bucket of Doge Apr 15 @ 5:56pm 
I want to have this on steam along with black mesa
hotcryx Apr 12 @ 5:14am 
With Black Mesa, it seems to be that HL3 is on the really on the way :D'
Dallas Apr 11 @ 2:03pm 
When the game is going 2 be realeased? I really want to play this :D I played black mesa great work :D