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  (1330 - 1340 of 1,405)
Kub Nov 30 2006, 6:44am says:

Agreed. Anyway - I ask you to ignore such posts. Once NatedGreat3 mentioned that I delete post with words about ripping off your work, so now I try to save each phrase that contains words "Black Mesa".
Btw, you guys had a nice release recently :)

+1 vote     reply to comment
tankkiller Nov 28 2006, 8:43pm says:

go look at the blackmesa source site

+1 vote     reply to comment
Fredythepwner Nov 24 2006, 7:08am says:

Well,i dont wanna rush you but if you get a demo out,BMS (Blackmesa:source) will be in deep **** since they only give medias.In ant rate,it looks great!

+1 vote     reply to comment
jonte00 Nov 25 2006, 5:31am says:

Do you got eny Xen ingame??? Exept the vortogaunt

+1 vote     reply to comment
Winterlord Nov 23 2006, 10:52am says:

Mod seems great! I hope it's finished soon (I've given up on the black mesa source-mod :p )

+1 vote     reply to comment
Shark2.1 Nov 21 2006, 6:44am says:

This very good company of best developers from Nasha-Life.
I trust that their project will be very successful!
Undoubtedly, before our eyes is born magnificent MOD.

+1 vote     reply to comment
Grand_General_Hot Nov 20 2006, 1:20pm says:

geostigma... Why don't you say that about maps that just look like valve work, becasue those look like rip off's....

+1 vote     reply to comment
geostigma Nov 19 2006, 10:21am says:

So glad you can rip off some of our work. :|

+1 vote     reply to comment
Ultemate Nov 18 2006, 5:22pm says:

Thanks all

we have this. I know, this not enough. And we're working on it. Thx for your suggestions.

+1 vote     reply to comment
MR.sugar Creator
MR.sugar Nov 18 2006, 2:24pm says:

Thats great!! I love this mod!!!

+1 vote   reply to comment
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