Games like DOOM: The Dark Ages
Games like DOOM: The Dark Ages include DOOM Eternal, DOOM, BioShock Infinite, Half-Life 2, and Black Mesa. We matched them by the tags players give DOOM: The Dark Ages on Steam (Action, FPS, Demons, Dark Fantasy, and Singleplayer): closest matches first, and among equally close ones the better-known games.

DOOM Eternal
Shared: FPS · Action · Gore

DOOM
Shared: FPS · Action · Gore

BioShock Infinite
Shared: Action · FPS · Singleplayer

Half-Life 2
Shared: Action · FPS · Singleplayer

Black Mesa
Shared: FPS · Action · Singleplayer

RoboCop: Rogue City
Shared: Action · FPS · Singleplayer

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

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

Half-Life
Shared: FPS · Action · Singleplayer

Call of Duty®
Shared: FPS · Action · Singleplayer

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

Titanfall® 2
Shared: FPS · Action · Singleplayer

Halo Infinite
Shared: FPS · Action · Singleplayer

Half-Life: Opposing Force
Shared: Action · FPS · Singleplayer

Metro Exodus
Shared: FPS · Singleplayer · Action

Halo: The Master Chief Collection
Shared: FPS · Sci-fi · Action

METRO 2033 Redux
Shared: FPS · Action · Singleplayer

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

BioShock™
Shared: FPS · Action · Singleplayer

METRO Last Light Redux
Shared: FPS · Action · Singleplayer

Wolfenstein: The Old Blood
Shared: Action · FPS · Gore

BioShock™ Remastered
Shared: FPS · Action · Singleplayer

Half-Life: Blue Shift
Shared: Action · FPS · Singleplayer

Battlefield™ 1
Shared: FPS · Action · Singleplayer