Games like The Nightmare Catcher
Games like The Nightmare Catcher include Half-Life 2, BioShock Infinite, Fallout 4, DOOM Eternal, and Black Mesa. We matched them by the tags players give The Nightmare Catcher on Steam (Action, Exploration, FPS, Shooter, and Adventure): closest matches first, and among equally close ones the better-known games.

Half-Life 2
Shared: Action · FPS · Shooter

BioShock Infinite
Shared: Action · Shooter · FPS

Fallout 4
Shared: Exploration · Adventure · Shooter

DOOM Eternal
Shared: Action · FPS · Shooter

Black Mesa
Shared: Action · FPS · First-Person

RoboCop: Rogue City
Shared: Action · FPS · First-Person

DOOM
Shared: Action · FPS · Shooter

Far Cry® 6
Shared: FPS · Action · Shooter

Far Cry® 4
Shared: Action · FPS · Adventure

Far Cry 3
Shared: Action · FPS · Adventure

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

Wolfenstein II: The New Colossus
Shared: Action · FPS · First-Person

Bright Memory
Shared: FPS · Action · Shooter

Call of Duty®
Shared: FPS · Action · Shooter

Ready or Not
Shared: FPS · Shooter · Action

Bright Memory: Infinite
Shared: Action · FPS · Shooter

Halo Infinite
Shared: FPS · Action · Shooter

PUBG: BATTLEGROUNDS
Shared: Shooter · FPS · Action

S.T.A.L.K.E.R. 2: Heart of Chornobyl - Standard Edition
Shared: FPS · Exploration · Shooter

Apex Legends™
Shared: FPS · Shooter · Action

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

Titanfall® 2
Shared: FPS · Shooter · Action

Metro Exodus
Shared: FPS · Action · First-Person

Necromunda: Hired Gun
Shared: Action · FPS · Adventure