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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Summer 2020 Update

News 30 comments

Is it really that time, again? Indeed it is! We hope you are all safe and doing well - it has been quite the year! Even though apocalyptic events, we are still busy at work on our games.

(Foxtrot Uniform by Brandon Smith and Chris Onorati)

Much has changed since our last update in November 2019. We are steadily working on all aspects of the game. More levels are nearing completion, and unlike previous years, it's apparent that we are shifting our focus onto actual gameplay. We are thrilled that both Guard Duty and Operation: Black Mesa are now starting to resemble actual games. While we have had some NPCs, weapons, and the like in-game for some time, we are finally about to implement human NPCs. This represents a major milestone as it means we can at long last start to work on scripted scenes and story elements.

(Hazard Course by Brandon Smith)

Some new additions to our team go hand in hand with this progress. We have brought on some very talented voice actors to fill the roles of some old friends, as well as a small handful of new faces. You can hear some voice acting samples attached to this update.

Our audio department has grown significantly. Other than new voice talent, we are pleased to welcome a new composer to the team. While it might be a bit saddening that not all of the older tracks will appear in the final product, fear not! Our new composer is not only producing new tracks, but re-creating some of the fan-favorites to ensure a cohesive listening experience. Alongside this article we are releasing a few new tracks - how do they sound to you? Please share your thoughts.

To give a proper closure to the topic of in-game audio, below are samples of the Security Guard and HECU Grunt. Give them a listen!

Other departments are still hard at work as well. Weapons are being fine-tuned, with playtesting driving them to a near-perfect state. We are now working on a stretch-goal for Operation: Black Mesa and Guard Duty to each have their own unique viewmodel animations that will match the style of each protagonist. Since we started publicly sharing weapon showcase videos, some of you have given us valuable feedback. One point of public concern was our HUD color scheme. While still a work in progress, here are some pictures of the most recent iteration of the HUD for both games. We look forward to hearing your thoughts.

Last but not least, we are excited to share some short gameplay teasers - presenting our take on the Voltigore's nest. We hope to bring you even more videos in the future.

In closing, we would like to encourage any talented individuals to apply to our team and help us finish making these games a reality. If interested in the projects, or if you know someone who might be, please see our "application guidelines​" for more detailed information. Current priority positions are:

  • 3D Artist (Organics)
  • 3D Artist (Hard Surface)
  • Graphics Programmer
  • Animator
  • Various Voice Acting Positions

(The Package by Lander Van Hove) (Welcome to Black Mesa by Chris Onorati)

We will have more to share soon, so stay tuned. In the meantime, there are some more media to please your eyes. We cannot wait to hear your thoughts. To make sure you don´t miss anything, you can go check out one of our social channels.

(Missing in action by Oliver Curtis)

(Crush Depth by Chris Onorati) (last screenshot by Chris Onorati and Brandon Smith)

(Alien flora concepts by Harry Willson)

June 2019 media update

June 2019 media update

News 34 comments

Why hello there! It's Tripmine Studios on the line, and we have something to share with you.

New Year update

New Year update

News 13 comments

These last 365 days of the year went by so fast with fun and excitement achieving our goals as a team, We can all say it has been a wonderful year so...

Summer 2018 update

Summer 2018 update

News 52 comments

With summer in full swing, we at Tripmine decided to bring some more excitement to the sun-bleached days with a brand new media update! summ(er)ary summ(er)ary

News 14 comments

Why hello there! The Summer season is nearing it´s conclusion and it might be the right time to say goodbye to hot summer days with our short summary...

RSS Files
Elevator to hell

Elevator to hell

Music 4 comments

An example from our soundtrack. This track is made by "Becket007".



Music 4 comments

An example of Xen track. This track is created by 8BitLord.

Sigh of relief

Sigh of relief

Music 6 comments

An example from our soundtrack. This track is made by "Mordekai"

Comments  (0 - 10 of 1,561)

Are you going to show us something in 20 anniversery of blue shift ?

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McSug4r Creator

I would like to say yes, but we really cannot promise anything. But we are working on this, don´t worry :).

Reply Good karma+4 votes

Hey so i just found out HECU Collective is also trying to make a Blue Shift remake are you guys ok with that?

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McSug4r Creator

We are fine with that, yea.

Reply Good karma+2 votes

Well if Guard Duty was to release first and HECU Collective was taking assets without asking, then yes. But any team has the right to remake something from scratch or not. It's not like 'only 1 team can make this' stigma or whatever.

Reply Good karma Bad karma0 votes

I don't understand why is that supposed to be a problem if everyone will decide to do a remake of Blue Shift they are free to do it

Reply Good karma Bad karma+6 votes

good to know!

Reply Good karma Bad karma-1 votes

how is development going?

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EvilGoodGuy Creator


Reply Good karma+3 votes

I'm curious if you're going to make Barney Calhoun talk.

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RT @marc_laidlaw: It's 2021: Black Mesa has bidets now.

Apr 7 2021 by tripminestudios

RT @ArtofMr_S: Forgot to post - Here's a saucy bootyshot of ya boiz in the H.E.C.U. #halflife #HECU #valve

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