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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

Operation: Thank You

Operation: Thank You

1 year ago News 10 comments

Thanks to everyone who supported us in year's MOTY competition!

Operation Black Mesa has been greenlit!

Operation Black Mesa has been greenlit!

2 years ago News 33 comments

Opposing force remake for Source engine has been greenlit!

Progress update

Progress update

2 years ago News 15 comments

What's new about Operation Black Mesa and Guard Duty? Both mods will release on MAC and Linux, and first multiplayer beta is releasing in Q1 2014.

Operation Black Mesa DEV.BLOG: Advanced AI

Operation Black Mesa DEV.BLOG: Advanced AI

2 years ago News 52 comments

Our team proudly presents our new AI system we implement for our NPCs. Check out this dev.blog for more information and a video.

RSS feed Downloads
Operation Black Mesa soundtrack

Operation Black Mesa soundtrack

5 years ago Audio 27 comments

This is our current soundtrack. It may or may not change in the future. "Oslo by night" by xhale. "Hundred Miles" by alexey v. "Weird view" by alexey...

Post comment Comments  (20 - 30 of 3,503)
DerDo Oct 28 2015 says:

Hey guys!!! I'm really a BIG BIG fan about your amazing work:-) I can't wait until it's done... and I can first play this awesome recreation of HL Opposing Force:-) I follow this projekt until it starts and I would be very happy about an update of the Progress:-)
stay still as cool as you are....:-)
Thanks you so lot!!!

+5 votes     reply to comment
Guest Oct 27 2015 says:

When are we going to see some updates?

+1 vote     reply to comment
TKAzA Staff
TKAzA Oct 26 2015 says:

Well done on getting greenlit, will this mean a paid product similar to black mesa?

+4 votes   reply to comment
FRAG121 Oct 30 2015 replied:

Many thanks! In terms of a paid product, we've discussed the option and seen Black Mesa's release onto early access, for now the idea is on a back burner as our priority is to complete work on the mod so everyone can enjoy the fruits of our labour.

+2 votes     reply to comment
Guest Oct 24 2015 says:

Oh, Lord, I know what it's like to be on a huge mod project for years and years. All I can say is, hang in there, and remember to be realistic about what you can actually accomplish. All the determination in the world isn't going to help you do something that's impossible. The trick is knowing what is possible and what is impossible.

+1 vote     reply to comment
vladimireremeyev Oct 24 2015 buried:


Welp, the dream is dead.

-5 votes     reply to comment
ZitaX Oct 19 2015 says:

Is there something wrong with the forums? They seem to have been down for a long time.

+2 votes     reply to comment
TheComedian.be Oct 22 2015 replied:

That's correct. We are working on the forums right now. We will let you know when they are up again.

+2 votes     reply to comment
JaxTellerChileno Oct 16 2015 says:

When we will see updates or news? :(

+4 votes     reply to comment
Tabajara77 Oct 20 2015 replied:

In any moment my friend. You all will see, just a little more wait. :-)

+4 votes     reply to comment
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