Games like Half-Life: Opposing Force
Games like Half-Life: Opposing Force include Half-Life 2, Half-Life, Black Mesa, Half-Life: Blue Shift, and Halo: The Master Chief Collection. We matched them by the tags players give Half-Life: Opposing Force on Steam (FPS, Action, Classic, Sci-fi, and Singleplayer): closest matches first, and among equally close ones the better-known games.
Half-Life 2
Shared: FPS · Action · Classic
Half-Life
Shared: FPS · Classic · Sci-fi
Black Mesa
Shared: FPS · Action · Sci-fi
Half-Life: Blue Shift
Shared: FPS · Action · Sci-fi
Halo: The Master Chief Collection
Shared: FPS · Classic · Sci-fi
BioShock Infinite
Shared: Action · FPS · Shooter
DOOM
Shared: FPS · Action · Shooter
Call of Duty®
Shared: FPS · Action · Singleplayer
Halo Infinite
Shared: FPS · Action · Singleplayer
RoboCop: Rogue City
Shared: FPS · Action · Singleplayer
BioShock™
Shared: FPS · Action · Singleplayer
DOOM Eternal
Shared: FPS · Action · Shooter
Call of Duty®: Black Ops III
Shared: FPS · Action · Shooter
STAR WARS™ Battlefront II (Classic, 2005)
Shared: Action · Classic · Shooter
Half-Life: Alyx
Shared: FPS · Action · Shooter
STAR WARS™ Republic Commando™
Shared: FPS · Action · Sci-fi
Quake
Shared: FPS · Action · Classic
Titanfall® 2
Shared: FPS · Action · Singleplayer
Counter-Strike
Shared: FPS · Action · Classic
Call of Duty® 4: Modern Warfare® (2007)
Shared: FPS · Action · Singleplayer
Quake II
Shared: FPS · Action · Classic
Wolfenstein: The New Order
Shared: FPS · Action · Singleplayer
BioShock™ Remastered
Shared: FPS · Action · Singleplayer
DOOM + DOOM II
Shared: FPS · Classic · Action