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 is still an amazing game, although it's not nearly as amazing as it was when it was released. Read More...

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Welcome to our first media update this year!

Read Full Article.

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 10 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 dev.blog for more information and a video.

RSS feed Downloads
Operation Black Mesa soundtrack

Operation Black Mesa soundtrack

6 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  (0 - 10 of 3,494)
mrkingdom 22hours 47mins ago says:

I'd like to know if the development of this mod has stopped or this mod is in active (or at least passive) development. It will be sad if this mod is "semi-dead". Thank you in advance

+1 vote     reply to comment
EvilGoodGuy 8hours 58mins ago replied:

I am one of the long-time devs on both OBM and GD and I can tell you that they are both alive, and will never die. Seriously every time this question is asked I laugh a little :P Well, maybe if we all die in a nuclear war or something it might, but other than that there will always be someone to keep it going. It's difficult for people outside the team, or who have never developed a game, to understand the time it takes. Especially when you don't have a stable work schedule due to members going to school, being busy with family and friends, going to work and actually making money so they don't live on the streets, lacking sufficiently talented team members, etc, etc. Not to mention that the teams themselves have changed so many times that it's not even funny. In the words of Forest Gump - "and dats all i have to say about dat" :)

+1 vote     reply to comment
Jonex_ Nov 23 2015 says:

Any plans for an eventual Steam release (paid or free)?

+3 votes     reply to comment
Tabajara77 Nov 26 2015 replied:

As said, we've discussed this subject many times and for now, the idea is to complete our work on the game first. So everyone can enjoy it! You will hear more about this information in the future on our announcements via Facebook's and Greenlight page.

+1 vote     reply to comment
Magnitud Nov 25 2015 replied:

Its not anywhere near being complete, so don't count on it :P

0 votes     reply to comment
Guest Nov 7 2015 says:

Will a playable demo/beta ever be released? because I know this deserves to have some way of playing for those who want to play it earlier.

+1 vote     reply to comment
Tabajara77 Nov 11 2015 replied:

We were planning to release a beta version of the O:BM MP back in 2014. You still will see our first beta coming out when it's done.

+1 vote     reply to comment
Guest Nov 20 2015 replied:

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wmf776759 Nov 10 2015 replied:


-1 votes     reply to comment
Guest Nov 6 2015 says:

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Clonest Nov 12 2015 replied:

Don't worry, it's a source engine game, if it doesn't have coop, i'll add it myself via file/map swaps and console commands for the weapons. I really hope it does though cus you can do this already with Black Mesa Source yet it ALWAYS crashes at some point or if another player touches a barnacle.

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Latest tweets from @opbm, @tripminestudios

Nov 15 2015 by tripminestudios

@Busterbboy Yes, ofcourse

Nov 15 2015 by tripminestudios

@CollinCreeper This is still Source :)

Aug 29 2015 by tripminestudios


May 13 2015 by tripminestudios

@Slingertale There are some volunteers, but we currently don't focus on translations.

May 11 2015 by tripminestudios

@Slingertale Of course we are.

May 11 2015 by tripminestudios

@Slingertale Hey, we are excited and happy they made it :). As for our plans with OBM/GD, it has no impact.

Dec 31 2014 by tripminestudios

We at @TripmineStudios wish you all the best and Happy New Year! T.co T.co

Dec 11 2014 by tripminestudios

We made it to the TOP100! Thanks everyone and here is small gift for you :). T.co

Nov 17 2014 by tripminestudios

we attended GDS 2014 in Prague. Great opportunity to meet other developers, share and gain experiences :) T.co

Nov 1 2014 by tripminestudios

@Berillions Hi, we are hard at work, just behind the curtain. Still alive, no need to worry :)

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Operation: Black Mesa
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