Operation: Black Mesa
Tripmine Studios · 2026 · FPS, Shooter, Action, First-Person, 3D
PC
Best price
Free
This game is free to play.
About Operation: Black Mesa
Experience the Half-Life™ expansion packs like never before. Operation: Black Mesa features reimaginings of both Half-Life™ Opposing Force and Half-Life™ Blue Shift through two unique campaigns. How will you survive the Black Mesa Incident? It's time to choose.