Operation: Black Mesa
Tripmine Studios · 2026 · FPS, Shooter, Action, First-Person, 3D
PC
This game is free to play. Get it on Steam →
Screenshots
About Operation: Black Mesa
Operation: Black Mesa is a fan-made reimagining of Gearbox's Half-Life™ Opposing Force and Half-Life™ Blue Shift.
Experience two unique single-player campaigns taking place during the Black Mesa Incident that started off the events of the Half-Life™ universe. Survive a day job gone wrong as security guard Barney Calhoun. Escape the doomed facility after a FUBAR'd mission as Corporal Adrian Shephard of the Hazardous Environment Combat Unit.
Two Campaigns in One
Experience two unique single-player campaigns taking place during the Black Mesa Incident that started off the events of the Half-Life™ universe. Survive a day job gone wrong as security guard Barney Calhoun. Escape the doomed facility after a FUBAR'd mission as Corporal Adrian Shephard of the Hazardous Environment Combat Unit.
Features
- Two single-player campaigns featuring expanded gameplay and new content.
- A plethora of engine enhancements and new graphical effects. The Source engine looks better than ever.
- Fast-paced combat with over 30 unique enemy types - Run. Think. Shoot. Live.
- Over eighteen weapons suited for all play styles. How will you survive Black Mesa?
- Original music. Two games - two soundtracks.
- Expanded narrative elements to connect with established Half-Life™ lore.
- Customize the game to your liking with a mod-friendly set of tools.
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