Games like Demon Itself
Games like Demon Itself include DOOM Eternal, DOOM, Post Void, Hades, and Roboquest. We matched them by the tags players give Demon Itself on Steam (Action Roguelike, Action, Boss Rush, Fast-Paced, and FPS): closest matches first, and among equally close ones the better-known games.

DOOM Eternal
Shared: Action · FPS · Fast-Paced

DOOM
Shared: Action · FPS · Fast-Paced

Post Void
Shared: Action Roguelike · FPS · Fast-Paced

Hades
Shared: Action Roguelike · Action · Indie

Roboquest
Shared: Action Roguelike · FPS · Fast-Paced

Devil Daggers
Shared: FPS · Action · Fast-Paced

Skul: The Hero Slayer
Shared: Action · Action Roguelike · Indie

ULTRAKILL
Shared: Fast-Paced · FPS · Action

SUPERHOT
Shared: Action · FPS · Indie

Risk of Rain (2013)
Shared: Action Roguelike · Action · Indie

The Binding of Isaac
Shared: Action Roguelike · Action · Indie

Neon White
Shared: FPS · Fast-Paced · Action

Titanfall® 2
Shared: FPS · Action · Singleplayer

Immortal Redneck
Shared: Action Roguelike · FPS · Fast-Paced

DOOM: The Dark Ages
Shared: Action · FPS · Demons

BPM: BULLETS PER MINUTE
Shared: Action · FPS · Action Roguelike

SULFUR
Shared: Action Roguelike · FPS · Singleplayer

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Indie · Difficult

ARMORED CORE™ VI FIRES OF RUBICON™
Shared: Action · Fast-Paced · Combat

MULLET MADJACK
Shared: FPS · Fast-Paced · Action

Deadlink
Shared: Action Roguelike · FPS · Fast-Paced

Megabonk
Shared: Action Roguelike · Action · Indie

Deep Rock Galactic: Rogue Core
Shared: FPS · Action Roguelike · Action

Battlefield™ 6
Shared: FPS · Action · Singleplayer