Games like Unearthing Mars 2: The Ancient War
Games like Unearthing Mars 2: The Ancient War include Half-Life 2, Half-Life: Alyx, Black Mesa, Titanfall® 2, and Half-Life. We matched them by the tags players give Unearthing Mars 2: The Ancient War on Steam (Action, FPS, Sci-fi, Singleplayer, and Mars): closest matches first, and among equally close ones the better-known games.

Half-Life 2
Shared: Action · FPS · Sci-fi

Half-Life: Alyx
Shared: VR · FPS · Action

Black Mesa
Shared: Action · FPS · Sci-fi

Titanfall® 2
Shared: FPS · Action · Singleplayer

Half-Life
Shared: FPS · Sci-fi · Action

Halo Infinite
Shared: FPS · Action · Singleplayer

BioShock Infinite
Shared: Action · FPS · Singleplayer

Half-Life: Opposing Force
Shared: Action · FPS · Sci-fi

Half-Life: Blue Shift
Shared: Action · FPS · Sci-fi

DOOM: The Dark Ages
Shared: Action · FPS · Singleplayer

DOOM
Shared: Action · FPS · Singleplayer

RoboCop: Rogue City
Shared: Action · FPS · Singleplayer

DOOM Eternal
Shared: Action · FPS · Singleplayer

Pavlov
Shared: VR · Action · FPS

Crysis Remastered
Shared: Action · FPS · Sci-fi

Call of Duty®
Shared: FPS · Action · Singleplayer

STAR WARS™ Republic Commando™
Shared: Action · FPS · Sci-fi

Bright Memory: Infinite
Shared: Action · FPS · Singleplayer

Call of Duty®: Black Ops III
Shared: FPS · Action · Singleplayer

Cyberpunk 2077
Shared: Singleplayer · FPS · Sci-fi

Halo: Campaign Evolved
Shared: Action · FPS · Sci-fi

BONEWORKS
Shared: VR · Action · Singleplayer

STAR WARS™ Battlefront™ II
Shared: Singleplayer · Action · Sci-fi

Wolfenstein II: The New Colossus
Shared: Action · FPS · Singleplayer