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 (61)
May 31 @ 9:02am
p2p or f2p?
May 23 @ 8:04pm
If you can add any weapon in the game...
ScrapBanking Pony
May 30 @ 2:45pm
give weapon_penguin
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Disco stu (zachftt) 3 hours ago 
In "Friendly Fire" during the part on the materials transport rail, will the HECU soldiers be able to follow you to the next area, or will they be trapped when you get on the cargo tram?
Xx_SpringTrap_xX 20 hours ago 
:( )
Stem May 31 @ 6:45am 
What is the percentage of this mod so far?
FOKUME May 31 @ 6:31am 
:O how much it will cost =C?
[LDT] FRAG | ᴏʙᴍ ᴅᴇᴠ  [author] May 30 @ 4:24pm 
Nope, just busy working!
SirFowler. May 30 @ 4:04pm 
is this mod dead?
blockaye May 30 @ 2:21pm 
captain von bottom uglyness May 30 @ 2:06pm 
did u know dat if u typ in console give weapon_penguin u get a penguin will ya add it or not?
Ca$h May 30 @ 4:50am 
Will buy it as soon as it'll be on sale :) My favorite game.
CW3D May 30 @ 12:46am 
what price would u give this devs?? i was thinking $15.00?