Games like Manus Dei
Games like Manus Dei include DOOM Eternal, METRO 2033 Redux, Left 4 Dead 2, DOOM, and Metro Exodus. We matched them by the tags players give Manus Dei on Steam (Action, Retro, FPS, Horror, and Shooter): closest matches first, and among equally close ones the better-known games.

DOOM Eternal
Shared: Action · FPS · Gore

METRO 2033 Redux
Shared: FPS · Action · Horror

Left 4 Dead 2
Shared: FPS · Action · Shooter

DOOM
Shared: Action · FPS · Shooter

Metro Exodus
Shared: FPS · Action · Post-apocalyptic

METRO Last Light Redux
Shared: FPS · Action · Post-apocalyptic

Trepang2
Shared: FPS · Shooter · Horror

Resident Evil Village
Shared: Horror · Action · First-Person

Ready or Not
Shared: FPS · Shooter · Horror

Call of Duty®
Shared: FPS · Action · Shooter

CULTIC
Shared: FPS · Action · Shooter

DUSK
Shared: Retro · FPS · Shooter

Counter-Strike 2
Shared: FPS · Action · Shooter

DOOM 64
Shared: Action · FPS · Retro

HROT
Shared: Retro · FPS · Action

Warhammer 40,000: Boltgun
Shared: Retro · FPS · Action

BioShock Infinite
Shared: Action · FPS · Shooter

Resident Evil Requiem
Shared: Action · Horror · FPS

Killing Floor 2
Shared: FPS · Gore · Action

Resident Evil 7 Biohazard
Shared: Horror · First-Person · Action

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

Quake
Shared: Action · FPS · Shooter

Back 4 Blood
Shared: FPS · Action · Shooter

Prodeus
Shared: Retro · FPS · Action