Games like Half-Life
Games like Half-Life include Half-Life 2, Half-Life: Opposing Force, Black Mesa, Halo: The Master Chief Collection, and Half-Life: Blue Shift. We matched them by the tags players give Half-Life on Steam (FPS, Classic, 1990's, Sci-fi, and Singleplayer): closest matches first, and among equally close ones the better-known games.
Half-Life 2
Shared: FPS · Classic · Sci-fi
Half-Life: Opposing Force
Shared: FPS · Classic · Sci-fi
Black Mesa
Shared: FPS · Sci-fi · Singleplayer
Halo: The Master Chief Collection
Shared: FPS · Classic · Sci-fi
Half-Life: Blue Shift
Shared: FPS · Sci-fi · Singleplayer
DOOM
Shared: FPS · Shooter · Action
Halo Infinite
Shared: FPS · Multiplayer · Singleplayer
Quake
Shared: FPS · Classic · 1990's
Call of Duty®
Shared: FPS · Multiplayer · Singleplayer
Call of Duty®: Black Ops III
Shared: FPS · Multiplayer · Shooter
Counter-Strike
Shared: FPS · Classic · Multiplayer
STAR WARS™ Battlefront II (Classic, 2005)
Shared: Classic · Multiplayer · FPS
Titanfall® 2
Shared: FPS · Multiplayer · Singleplayer
BioShock Infinite
Shared: FPS · Shooter · Action
Quake II
Shared: FPS · Classic · 1990's
Counter-Strike 2
Shared: FPS · Multiplayer · Shooter
DOOM + DOOM II
Shared: FPS · Classic · 1990's
DOOM Eternal
Shared: FPS · Action · Shooter
STAR WARS™ Republic Commando™
Shared: FPS · Sci-fi · Singleplayer
Battlefield™ 1
Shared: FPS · Multiplayer · Singleplayer
Call of Duty® 4: Modern Warfare® (2007)
Shared: FPS · Multiplayer · Classic
Aliens vs. Predator™
Shared: FPS · Sci-fi · Action
BioShock™
Shared: FPS · Singleplayer · Action
RoboCop: Rogue City
Shared: FPS · Singleplayer · Action