Games like Gates of Hell
Games like Gates of Hell include DUSK, Warhammer 40,000: Boltgun, CULTIC, Devil Daggers, and ULTRAKILL. We matched them by the tags players give Gates of Hell on Steam (Horror, FPS, Arena Shooter, Demons, and Boomer Shooter): closest matches first, and among equally close ones the better-known games.

DUSK
Shared: FPS · Boomer Shooter · Horror

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

CULTIC
Shared: FPS · Boomer Shooter · Horror

Devil Daggers
Shared: FPS · Horror · Arena Shooter

ULTRAKILL
Shared: FPS · Boomer Shooter · Arena Shooter

HROT
Shared: FPS · Retro · Boomer Shooter

DOOM
Shared: FPS · Demons · Shooter

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

AMID EVIL
Shared: FPS · Boomer Shooter · Arena Shooter

BRAZILIAN DRUG DEALER 3: I OPENED A PORTAL TO HELL IN THE FAVELA TRYING TO REVIVE MIT AIA I NEED TO CLOSE IT
Shared: FPS · Arena Shooter · Boomer Shooter

ODDCORE
Shared: Arena Shooter · FPS · Boomer Shooter

Project Warlock
Shared: FPS · Boomer Shooter · Retro

DOOM 64
Shared: FPS · Retro · Action

WRATH: Aeon of Ruin
Shared: FPS · Boomer Shooter · Retro

Warhammer 40,000: Boltgun 2
Shared: FPS · Boomer Shooter · Retro

Quake
Shared: FPS · Shooter · Action

Turbo Overkill
Shared: FPS · Boomer Shooter · Retro

Monument
Shared: Arena Shooter · FPS · Boomer Shooter

DOOM Eternal
Shared: FPS · Demons · Action

Prodeus
Shared: FPS · Boomer Shooter · Retro

Trepang2
Shared: FPS · Horror · Shooter

Left 4 Dead 2
Shared: FPS · Horror · Shooter

Ready or Not
Shared: FPS · Horror · Shooter

Project Warlock II
Shared: Boomer Shooter · Retro · FPS