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

21 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 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 1,405)
MECHANIX Sep 21 2007, 7:42pm says:

Please contact Valve and sell this. T___T
I´d prefer buying this and knowing that I will get to see some more of you guys in the future. And about the name, not gonna change it? Barney´s Tales sounds so... Un-Half-Life. D:
Like Half-Life means something scientific and so does Blue Shift and Opposing Force and ****. :O
Why not just call it Guard Duty? The beta name for Blue Shift. Sounds wicked and ****.

Best of luck,

+1 vote     reply to comment
KILLER89(FIN) Sep 21 2007, 3:07am says:

release E S T I M A T E: 2007

you do know, what estimate means? ;)

+1 vote     reply to comment
sutra_668 Oct 8 2007, 9:38am says:

are you making new websate?? i love your work it's profesional i was once work on maps for suries sam i spend over 14 months with it:) and i now how dificculd it is to make lever to look prety and dont cut fps:D

+1 vote     reply to comment
Medkit Sep 11 2007, 5:00pm says:

If u were refering to me, well I didn't think your idea as bad, but it will harden the game...
Anyway every mods need some new challanges, so if the headscrabs would hop up onto are heads -- well, I'd like it afterall...

BTW, this mod will be really released in 2007? -Sometime in the remaining 110 days?

+1 vote     reply to comment
MECHANIX Sep 10 2007, 12:08pm says:

DUDE! THANKS!! :D :D THis other guy said my idea was crap. :( Thanks man. :) ^^

+1 vote     reply to comment
Amez Sep 9 2007, 2:37pm says:

Your a genius man!!! Why don't the headcrabs actualy attach themselves on a human, in HL2 they should've done it. Do it in this mod!!!

+1 vote     reply to comment
MECHANIX Sep 9 2007, 8:50am says:

You know what you guys should do? Make it so that the headcrabs attach themselves on other humans. For example: You have a scientist right by your side and a headcrab appears. Instead of it killing the scientist, it just jumps on his face.


+1 vote     reply to comment
Ultemate Sep 3 2007, 6:34am says:

The winners will be the gamers. That's it.

+1 vote     reply to comment
Medkit Sep 3 2007, 2:47am says:

The winner will be the one, which comes out first!

+1 vote     reply to comment
ebol4 Sep 2 2007, 7:41pm says:

Basically what I was trying to say was that I think BMS will be better but BSS will rock too.

+1 vote     reply to comment
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