Games like Project Nightmare
Games like Project Nightmare include Counter-Strike 2, DOOM, BioShock Infinite, Left 4 Dead 2, and Far Cry® 5. We matched them by the tags players give Project Nightmare on Steam (Action, Action-Adventure, Shooter, Action Roguelike, and FPS): closest matches first, and among equally close ones the better-known games.
Counter-Strike 2
Shared: Shooter · Action · FPS
DOOM
Shared: Action · FPS · Shooter
BioShock Infinite
Shared: Action · Shooter · FPS
Left 4 Dead 2
Shared: Shooter · FPS · Action
Far Cry® 5
Shared: Action-Adventure · Shooter · FPS
Black Mesa
Shared: Action · FPS · Shooter
BlazBlue Entropy Effect
Shared: Action · Action Roguelike · Action-Adventure
Call of Duty®
Shared: Shooter · Action · FPS
DOOM Eternal
Shared: Action · FPS · Shooter
Far Cry® 6
Shared: Action-Adventure · FPS · Action
Resident Evil Requiem
Shared: Action · FPS · Action-Adventure
Half-Life 2
Shared: Action · FPS · Shooter
VLADiK BRUTAL
Shared: Shooter · Action · FPS
Call of Duty®: Black Ops III
Shared: Action · Shooter · FPS
METRO 2033 Redux
Shared: FPS · Action · Shooter
CULTIC
Shared: Shooter · Action · FPS
Counter-Strike: Source
Shared: Action · Shooter · FPS
Aimlabs
Shared: Shooter · Action · FPS
Skul: The Hero Slayer
Shared: Action · Action Roguelike · 2D
PUBG: BATTLEGROUNDS
Shared: Shooter · Action · FPS
Battlefield™ 1
Shared: FPS · Action · Shooter
METRO Last Light Redux
Shared: Action · FPS · Shooter
Ready or Not
Shared: Shooter · FPS · Action
The Darkness II
Shared: Action · FPS · Shooter