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Half-Life: Opposing Force

Gearbox Software · Valve · 1 Nov 1999 · Steam

Steam reviews95% positive25,561 reviews · Overwhelmingly Positive

Store: Steam
Platform: Steam
Release date: 1 Nov 1999
Developer: Gearbox Software
Publisher: Valve
Players: 2+
Features: Custom Volume Controls, Adjustable Difficulty, Playable without Timed Input, Save Anytime, Valve Anti-Cheat enabled, Family Sharing
Ways to play: Multiplayer
Play modes: Windows, macOS, Linux
Availability: Available now

Return to the Black Mesa Research Facility as one of the military specialists assigned to eliminate Gordon Freeman. Experience an entirely new episode of single player action. Meet fierce alien opponents, and experiment with new weaponry. Named 'Game of the Year' by the Academy of Interactive Arts and Sciences.