Games like Devil's Desk
Games like Devil's Desk include CULTIC, Warhammer 40,000: Boltgun, DOOM, Forgive Me Father, and DUSK. We matched them by the tags players give Devil's Desk on Steam (Action, Shooter, Boomer Shooter, FPS, and Hack and Slash): closest matches first, and among equally close ones the better-known games.

CULTIC
Shared: Boomer Shooter · Shooter · FPS

Warhammer 40,000: Boltgun
Shared: Boomer Shooter · FPS · Shooter

DOOM
Shared: Action · FPS · Shooter

Forgive Me Father
Shared: Boomer Shooter · Action · FPS

DUSK
Shared: Boomer Shooter · Shooter · FPS

DOOM Eternal
Shared: Action · FPS · Shooter

POSTAL: Brain Damaged
Shared: Action · Shooter · Boomer Shooter

SharpShooter3D
Shared: Boomer Shooter · Action · FPS

HROT
Shared: Boomer Shooter · Shooter · FPS

BioShock Infinite
Shared: Action · Shooter · FPS

Turbo Overkill
Shared: Action · Boomer Shooter · FPS

Left 4 Dead 2
Shared: FPS · Shooter · Action

Bright Memory
Shared: Shooter · FPS · Action

Serious Sam: Siberian Mayhem
Shared: Action · Boomer Shooter · Shooter

Call of Duty®
Shared: Shooter · FPS · Action

Prodeus
Shared: Boomer Shooter · FPS · Action

Half-Life 2
Shared: Action · FPS · Shooter

DOOM + DOOM II
Shared: Action · FPS · Boomer Shooter

Bright Memory: Infinite
Shared: Action · FPS · Shooter

Selaco
Shared: Shooter · FPS · Action

Trepang2
Shared: Shooter · FPS · Action

DOOM 64
Shared: Action · FPS · Shooter

Aimlabs
Shared: Shooter · FPS · Action

Shadow Warrior
Shared: Action · FPS · Shooter