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Welcome to our first media update this year!

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Multiplayer Beta Release Q1 2014 Cancelled

Our plan to bring you the multiplayer beta of Operation Black Mesa early this year didn't work out, regrettably. Several factors and circumstances forced us to completely keep it under the hood until further notice.

Multiplayer Progress

Multiplayer will feature classic maps such as Yard, Crossfire and Boot Camp as well as brand-new ones like Deptcharge and Gambit from day 1.
Currently in development: CTF mode and weapon placement.


Singleplayer Campaign

Development is running smoothly; those NPCs aren't going to animate themselves though! If you're interested in joining our team, check out the jobs page where you can find all positions currently open. We look forward to welcoming you on board!

Pit Worm's Nest

Remember Guard Duty (Blue Shift: Source)? We're making solid progress here too:

Living Quarters Outbound

OBM: The Video Game?

We've been given the option of developing our projects as full indie titles to be sold on Steam!
This opens up a whole lot of attractive possibilities to consider; however no decision has been reached yet as to this matter.

Alien Controller

M1A1 Tank

Thanks for your support in making all of this possible!

Until next time,
Tripmine Dev Team

Operation: Thank You

Operation: Thank You

1 year ago News 9 comments

Thanks to everyone who supported us in year's MOTY competition!

Operation Black Mesa has been greenlit!

Operation Black Mesa has been greenlit!

2 years ago News 33 comments

Opposing force remake for Source engine has been greenlit!

Progress update

Progress update

2 years ago News 15 comments

What's new about Operation Black Mesa and Guard Duty? Both mods will release on MAC and Linux, and first multiplayer beta is releasing in Q1 2014.

Operation Black Mesa DEV.BLOG: Advanced AI

Operation Black Mesa DEV.BLOG: Advanced AI

2 years ago News 52 comments

Our team proudly presents our new AI system we implement for our NPCs. Check out this for more information and a video.

Operation: Black Mesa is a total Source remake of Half Life: Opposing Force. Using the Source engine, the developers plan to recreate the Black Mesa research Facility as it was seen by Corporal Adrian Shephard of the H.E.C.U. Half-life: Opposing Force...
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Operation Black Mesa soundtrack

Operation Black Mesa soundtrack

5 years ago Audio 27 comments

This is our current soundtrack. It may or may not change in the future. "Oslo by night" by xhale. "Hundred Miles" by alexey v. "Weird view" by alexey...

Post comment Comments  (60 - 70 of 3,454)
lolpants Aug 22 2015 buried:


Alright this mod is dead , people start searching for something else like fallout 4 to sit on your *** and wait for ;)

-10 votes     reply to comment
epicstufff Aug 24 2015 replied:

In the words of Socrates, "Go fornicate yourself."

+5 votes     reply to comment
cpldingo1987 Aug 22 2015 replied:

Seriously don't you have anything better to troll? Do you just sit here on this page constantly clicking refresh hoping for another reply to your ridiculous comments? Maybe you should go and take your own advice, or you know go frag yourself.

+2 votes     reply to comment
Crypt Aug 22 2015 replied:

How strange, the last repository commit was 2 days ago. That can't be good, the game's dead!

+6 votes     reply to comment
Tabajara77 Aug 24 2015 replied:

I think we're all zombies Crypt. Basically undead. Heh

+2 votes     reply to comment
flashrobi4u Aug 12 2015 says:

Still no updates?

+2 votes     reply to comment
modvsgame Aug 8 2015 says:

i wish you all the best on this mod.
i never thought i would be more excited for a mod than i ever was for a lot of the games that are coming out.

+8 votes     reply to comment
powermind Aug 10 2015 replied:

You and me both.

+4 votes     reply to comment
AidenDemon Aug 4 2015 says:

It's better OBM release than Half Life 3, finish it and i'll pay to you.

-3 votes     reply to comment
vforvendetta17 Jul 29 2015 buried:


i see 1 video the half life 3 never relaese but i think is fake

-14 votes     reply to comment
vforvendetta17 Jul 29 2015 buried:


sorry my english is not so good

-13 votes     reply to comment
vforvendetta17 Jul 29 2015 buried:


hey you hear all the half life 3 is never relaese is that truth???

-14 votes     reply to comment
powermind Jul 29 2015 replied:

I don't wanna be rude but, please fix your grammar.

+1 vote     reply to comment
TheSleepingObama Jul 28 2015 says:

I wonder if anyone will do a remix of Black mesa and Operation BM, and kinda mix the pot. Race X and Black Operations added to Black Mesa anyone?

+1 vote     reply to comment
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Operation: Black Mesa
Operation: Black Mesa
Last Update
10 months ago
5,396 members