Games like Deeper In The Dark
Games like Deeper In The Dark include Half-Life 2, BioShock Infinite, Black Mesa, Titanfall® 2, and DOOM. We matched them by the tags players give Deeper In The Dark on Steam (Action, Sci-fi, Singleplayer, FPS, and Shooter): closest matches first, and among equally close ones the better-known games.

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

BioShock Infinite
Shared: Action · Shooter · FPS

Black Mesa
Shared: Action · FPS · Sci-fi

Titanfall® 2
Shared: FPS · Singleplayer · Action

DOOM
Shared: Action · FPS · Shooter

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

Halo Infinite
Shared: Singleplayer · FPS · Action

Ready or Not
Shared: FPS · Shooter · Singleplayer

Call of Duty®
Shared: FPS · Action · Singleplayer

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

Bright Memory: Infinite
Shared: Action · FPS · Singleplayer

RoboCop: Rogue City
Shared: Action · FPS · Singleplayer

DOOM Eternal
Shared: Action · FPS · Shooter

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

Battlefield™ 2042
Shared: FPS · Singleplayer · Shooter

STAR WARS™ Battlefront II (Classic, 2005)
Shared: Action · Shooter · Sci-fi

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

Starship Troopers: Extermination
Shared: Action · Sci-fi · FPS

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

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

Wolfenstein: The New Order
Shared: Action · FPS · Singleplayer

Crysis Remastered
Shared: Action · Sci-fi · FPS

Halo: Campaign Evolved
Shared: Action · FPS · Singleplayer

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