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
Jan 17 @ 5:54am
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

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: [/h1]


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 (50)
Jan 19 @ 5:54pm
If you can add any weapon in the game...
23 hours ago
Would this be paid for? or some kind of free DLC to Black Mesa?
Mar 26 @ 1:55pm
Is it coming soon? :D
Sharky McOmNom
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Tabajara Mar 27 @ 2:21pm 
Ops sorry for my nickname change hahaha. Glad to help!
TheLoneRoman Mar 27 @ 2:18pm 
Ehrm... Typo.. Anyway. Thanks for the Info on Guard Duty.
TheLoneRoman Mar 27 @ 10:04am 
Thabks for the Info.
Cpt. Hazama Mar 26 @ 9:44pm 
I think I just found my next SNPC pack for Garry's Mod to make xD
Tabajara Mar 24 @ 11:25am 
The "Blue Shift" remake is called "Guard Duty" and will be release as a free DLC inside the Operation:Black Mesa game.
BOT Colt_0pz Mar 23 @ 9:11pm 
Im pretty sure this is also for guard duty
animalhouse Mar 22 @ 4:37pm 
what do we want BLACK MESA AND OPERATION BLACK MESA!! when do we want it NOW!! do it valve or we will keep buging you about ep 3. whens ep 3 whens ep 3 whens ep3 whens ep3 when will you add this and black mesa
TheLoneRoman Mar 21 @ 7:01pm 
Excuse me Operation Black Mesa team, is the Blue Shift remake being released? if so what will it be called? As a last question, is there anyway I can help you guys? Just wondering. Anyway I cant wait for Both games to be released! :D
ciaran Mar 20 @ 6:05am 
Blue shift coming after this? :D
Маджахед Mar 18 @ 9:20am