Games like Putrefaction
Games like Putrefaction include DOOM, DOOM Eternal, Trepang2, Left 4 Dead 2, and Black Mesa. We matched them by the tags players give Putrefaction on Steam (Action, FPS, Indie, Horror, and Gore): closest matches first, and among equally close ones the better-known games.

DOOM
Shared: FPS · Action · Gore

DOOM Eternal
Shared: FPS · Action · Gore

Trepang2
Shared: FPS · Shooter · Horror

Left 4 Dead 2
Shared: FPS · Action · Shooter

Black Mesa
Shared: FPS · Action · Shooter

Bright Memory: Infinite
Shared: Action · FPS · Indie

Half-Life 2
Shared: Action · FPS · Singleplayer

Ready or Not
Shared: FPS · Shooter · Horror

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

BioShock Infinite
Shared: Action · FPS · Shooter

ULTRAKILL
Shared: FPS · Gore · Fast-Paced

SUPERHOT
Shared: Action · FPS · Indie

Resident Evil Village
Shared: Horror · Action · Singleplayer

DOOM 3
Shared: FPS · Action · Horror

Call of Duty®
Shared: FPS · Action · Shooter

DOOM 3
Shared: Action · FPS · Horror

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

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

Back 4 Blood
Shared: FPS · Action · Gore

Titanfall® 2
Shared: FPS · Action · Shooter

RoboCop: Rogue City
Shared: Action · FPS · Singleplayer

DUSK
Shared: FPS · Horror · Shooter

The Darkness II
Shared: Action · FPS · Gore

F.E.A.R.
Shared: FPS · Action · Horror