Half-Life: Opposing Force

Opposing Force returns to the same setting as Half-Life, but instead portrays the events from the perspective of a U.S. Marine, one of the enemy characters in the original game. The player character, Adrian Shephard, is sent in to neutralize the Black Mesa Research Facility after a scientific mishap causes it to be invaded by aliens, but quickly finds that the Marines are outnumbered and slowly being beaten back by a second alien race and black operations units.

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Developer

Gearbox Software

Publisher

Sierra EntertainmentValve

Platforms

PC, Mac, LinuxPC · Mac · Linux

Genres

ShooterPlatformerPuzzle

Themes

ActionScience fictionThrillerWarfare

Modes

Single-playerMultiplayer

Perspectives

First person

Age ratings

ESRB M, PEGI 16ESRB M · PEGI 16