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
Mar 22, 2013 @ 2:15pm
Sep 12, 2013 @ 11:16am
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
Release date: Q1 2014
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:


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 (39)
Apr 17 @ 12:36pm
If you can add any weapon in the game...
King Madman Lord of all Chicken
Apr 2 @ 4:09pm
PINNED: Ask the developers PART 2
Mar 21 @ 7:58am
Should the game be longer than Opposing force?
Original the Character
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dark caboose Apr 19 @ 3:08am 
how long till release
pdizzlemynizzlefoschizzle Apr 18 @ 5:19pm 
Carnag000 Apr 17 @ 10:48am 
@Dark_Master this isnt a VALVe game, its a half-life 2 modification

when will this be released?
Dark_Master Apr 17 @ 3:18am 
Valve Please Add this
Batman Apr 16 @ 2:03am 
бом бом
Pyrocrusher1580 Apr 15 @ 10:16pm 
guys have you considered that black messa has not been released on steam yet if that is not out yet by July then [black mesa opposing force] will not be released until i would say February or march so i would not keep waiting for this game to come out just get black mesa to pass the time from get it from moddb it is the easiest way or get garrys mod that is a fun game but you can try to make a oppising force map in garrys mod if you do i will subscribe to it and i think opposing force 2 should be out in less time the game already has its beta phrase just get the fisrt part of it
Captain Punch Apr 15 @ 11:53am 
VALVE PLZ ADD THIS. its like half life opposing force with black mesa source graphics
@T-rex: Yes. Because they saw that they've made a bad job with HL:S and no one liked it. Of course making a mistake is ok, but making another one for the same reason would be just dumb to be honest.
JackShpackCrus Apr 13 @ 12:15am 
guys , can't wait ! I have no doubt that it will be divine remake )
Heatblast98 Apr 11 @ 7:30pm 
i am extremly looking foreward for this to come out