You are Barney Calhoun, a security guard at the Black Mesa Research Facility. Unknowingly to you, the next few hours of your shift will change your life forever...
Re-live the exciting adventure of Blue Shift on the award winning Source Engine and prepare for the shift of your life!
Welcome to Guard Duty.


- As a total conversion mod, Guard Duty aims to be composed of entirely custom content
- All original maps re-created and re-envisioned for better realism and gameplay.
- Some maps are enlarge/extended to create a more lengthy and immersive game.
- Improved AI, making enemies smarter and even more dangerous than ever before.
- More enemy encounters to keep the action fresh.
- Scripted scenes with all the original Blue Shift characters to help bring the story to life.
- Textures and models that will push the limit of the Source Engine, to bring you as much artistic detail as possible.
- All new voices, sounds and music.
- Multiplayer, which may (or may not) contain various game modes.

And much more!

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Living quarters outbound Hazard Course Concepts
Blog RSS Feed Report abuse Latest News: 2014 Kickoff Update

22 comments by Uphys on Mar 29th, 2014

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

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Elevator to hell

Elevator to hell

Jun 15, 2011 Music 4 comments

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



Jun 15, 2011 Music 2 comments

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

Sigh of relief

Sigh of relief

Oct 16, 2009 Music 6 comments

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

Post comment Comments  (1200 - 1210 of 1,434)
SourHyperion1 Dec 30 2007, 9:03pm says:

Good work guys keep going!!!! :)

+1 vote     reply to comment
Bluedrake42 Dec 30 2007, 4:08pm says:

You guys should team up With the BM team.
I think a total overhaul of all the original Half-Lives would be perfect.
Isn't there another team working on Opposing force source?
You three teams should get together
The original Half-Life going to source is a worthy cause after all.
It would be nice if you all worked together =)
and made it the best it can be =D

0 votes     reply to comment
SpAM_CAN Jan 3 2008, 4:02am replied:

Now THAT is a good idea! Team up with Op Black Mesa too, then the HALF-LIFE SOURCE saga will be complete!

+1 vote     reply to comment
MR.sugar Creator
MR.sugar Dec 30 2007, 4:11pm replied:

They should release media update :). And teaming up with BM team isnt good idea i think.

+1 vote   reply to comment
dufake Dec 28 2007, 8:48am says:

What's done is impressive ,however the team must be huge......
The whole black mesa incident is too complex and large.

+2 votes     reply to comment
denzil Dec 26 2007, 5:11pm says:

Looking forward to the mod and the next update (a little hypocritical coming from a Black Mesa developer I know lol), but I genuinely look forward to having a run around :)


+1 vote     reply to comment
DUDER Dec 26 2007, 3:55pm says:

And ''Keep'' ''it'' ''up'' this mod rulez XD!.

+1 vote     reply to comment
cobo10201 Dec 24 2007, 9:26am says:

wen is the website comming? i no tht hur probably workin hard on the mod but a website would be nice

0 votes     reply to comment
MR.sugar Creator
MR.sugar Dec 24 2007, 3:32pm replied:

They are still looking for designer :(

0 votes   reply to comment
foxatphoenixlabs Dec 24 2007, 12:47am says:

voted again.

+1 vote     reply to comment
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