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

15 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 1,379)
Lord_Grievous Aug 13 2007, 6:05am says:

Nice job, keep it up!

+1 vote     reply to comment
JonathanPL Aug 13 2007, 4:25am says:

You pwn

+1 vote     reply to comment
c4Menace Aug 12 2007, 9:50pm says:

ZOMG change your name to Second Shift... you know you wana :)

+1 vote     reply to comment
Forsete Aug 12 2007, 8:55pm says:

Is this still slated for a 2007 release?

+1 vote     reply to comment
SC.Nick Aug 12 2007, 8:08pm says:

Blue shift was the first half life i played ever and its an ace game. Cool to see someones doing the source version.

+1 vote     reply to comment
Ultemate Aug 12 2007, 5:08pm says:

2ThecoolGMan Well, operation black mesa is out of the game, how I know... thats very sad.

+1 vote     reply to comment
Xylemon Aug 12 2007, 5:02pm says:

you guys updated. Huh, I thought you guys were dead. Well good luck with you're competition with black mesa and operation black mesa. :)

+1 vote     reply to comment
freredarme Aug 12 2007, 5:46am says:

Mieu que black mesa source
NICE!! I love you're mod xD

+1 vote     reply to comment
ZitaX Aug 7 2007, 1:42pm says:

Tnx for the interwiev MR.sugar,Can't wait for this mod! ^^

+1 vote     reply to comment
cobo10201 Aug 7 2007, 9:38am says:

i guess ill ask again... wats with your site i cant click the link. im not sure if thats a good thing and it means that your working on the site or wat it means at all

+1 vote     reply to comment
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