This is Guard Duty. Put your feet in the shoes of Barney Calhoun, a security guard at the Black Mesa Research Facility who has no idea that the next few hours are going to change his life forever. Re-live the exciting adventure of Blue Shift, now re-created in the award winning Source engine. Read More...

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Every vote counts and may win you a game on Steam!

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 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.

Greenlight incoming for Blue shift and Opposing force remakes !

Greenlight incoming for Blue shift and Opposing force remakes !

2 years ago News 29 comments

Few words about Greenlight, progress and more about Guard Duty and Operation Black Mesa.

Guard Duty and Operation Black Mesa- MOTY update

Guard Duty and Operation Black Mesa- MOTY update

3 years ago News 12 comments

Tripmine studios decided to give you some new media from Operation Black Mesa and Guard Duty. Hope you enjoy them.

Report for duty

Report for duty

3 years ago News 15 comments

Small update and invitation to our multiplayer session in the original Opposing Force: Multiplayer.

RSS feed Downloads
Elevator to hell

Elevator to hell

4 years ago Music 4 comments

An example from our soundtrack. This track is made by "Becket007".



4 years ago Music 3 comments

An example of Xen track. This track is created by 8BitLord.

Sigh of relief

Sigh of relief

6 years ago Music 6 comments

An example from our soundtrack. This track is made by "Mordekai"

Post comment Comments  (10 - 20 of 1,469)
TheDalekCaan Aug 25 2015 says:

There's another mod called "Black Mesa: Insecurity" that does the same job of re-creating Blue Shift. Perhaps you guys should team up?

+1 vote     reply to comment
Crypt Aug 25 2015 replied:

We're well aware of that mod, but that guy's goal is different.
He wants to recreate Blue Shift as an expansion for Black Mesa, we want to create it as a standalone game without any of the creative or technical limits Black Mesa presents.

+1 vote     reply to comment
TheDalekCaan Aug 25 2015 replied:

Oh, I see. You guys should contact each other, though. Maybe you can learn some things from each other! :3

+1 vote     reply to comment
EvilGoodGuy Sep 7 2015 replied:

If I am not mistaken, Skyms (the creater of Insecurity), used to be on the OBM team a long time ago when I first joined. He is well aware of us.

+1 vote     reply to comment
skyms2663 Sep 12 2015 replied:

Indeed this is correct :)

+1 vote     reply to comment
TimelessHero790 Aug 8 2015 says:

This mod looks really promising. Am I mistaken or does this actually look a bit more beautiful than the Half-Life 2 Source Engine? Not too noticeable but I feel that there is a bit of a difference. Blue Shift wasn't perfect to be honest but it was still really good and also very gutsy having a lot to live up to following the masterpiece of the main game. Hopefully Guard Duty improves on the original without straying too far from it. Quick question, the mod isn't dead, right? I hope the answer to that is no. Best of luck to the Developer!

+1 vote     reply to comment
Bachu8 Jul 30 2015 says:

The mod looks really good so far. I just have one question: Will Barney have a voice? Taking into account that in the original mod he makes conversations with NPCs only that we can't hear him, and that he indeed talks in Half-Life 2, I think that he should have a voice in this remake. This is just my opinion and I'll understand if you disagree.

-1 votes     reply to comment
chlide Jul 10 2015 says:

hey, I am looking forward to this.
Out of curiosity, how much is there left? :)

+1 vote     reply to comment
Crypt Jul 14 2015 replied:

There's no accurate way for us to calculate exactly what's left. Rest assured, we're working to get it finished as best and as quick as we can!

+1 vote     reply to comment
Guest Aug 18 2015 replied:

This comment is currently awaiting admin approval, join now to view.

Crypt Aug 22 2015 replied:

There's really no need. If you completely disregard the legal stuff, crowdfunding wouldn't be of much use.

It would have to be an amount that would allow the entire team to quit their jobs for an extended period of time to work full time in order to be of any good use, and that's not going to happen.

+2 votes     reply to comment
RockyBrown Jul 7 2015 says:

Can you meet Gordon?

+1 vote     reply to comment
MR.sugar Creator
MR.sugar Jul 9 2015 replied:

Just like in the original, yea.

+1 vote   reply to comment
TheDalekCaan Aug 25 2015 replied:

Which model are you using? :3

+1 vote     reply to comment
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