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!

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

19 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

Media RSS Feed Latest Audio
Downloads RSS Feed Latest Downloads
Elevator to hell

Elevator to hell

Jun 15, 2011 Music 1 comment

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 1,389)
Amez Aug 23 2007, 3:08am says:

The mod watch updates rushed me back here! Hmm I think your mod achieved itself to 60% than before 50%. Or I don't know haha, though still this mod is freakin amazing. Just amazing...

+1 vote     reply to comment
Ultemate Aug 25 2007, 10:53am says:

under construction

+1 vote     reply to comment
Kester Aug 22 2007, 5:40am says:

Couple of million I'd expect. Although its irrelevant as it's the high poly model which is baked down to a normal map for the low poly.

+1 vote     reply to comment
freredarme Aug 21 2007, 12:13pm says:

Number poly for the grunt?

+1 vote     reply to comment
prob101 Aug 20 2007, 4:27pm says:

nope cant go there either.

+1 vote     reply to comment
cobo10201 Aug 20 2007, 2:11pm says:

am i the only one tht cant get on the website???

+1 vote     reply to comment
Kub Aug 20 2007, 6:33am says:

cplfreeman, read the Q&A, please (:

+1 vote     reply to comment
cplfreeman Aug 19 2007, 7:30pm says:

This mod looks great, but I know you guys are russian so what are going to do for voice acting? Are you going to just use the originals?

+1 vote     reply to comment
Amez Aug 16 2007, 1:01am says:

I'm still keeping an eye on this mod, I can't just wait until it comes out! I'm just hooked into playing source engine games, so this one I'll buy me a 24 pack of red bull and just play this mod haha.

+1 vote     reply to comment
mathew1927 Aug 14 2007, 5:07am says:


+1 vote     reply to comment
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