Games like DOOM SPIRAL
Games like DOOM SPIRAL include Serious Sam: Siberian Mayhem, CULTIC, DOOM, Counter-Strike 2, and POSTAL: Brain Damaged. We matched them by the tags players give DOOM SPIRAL on Steam (Action, Shooter, Boomer Shooter, Roguelite, and 3D): closest matches first, and among equally close ones the better-known games.

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

CULTIC
Shared: Boomer Shooter · Shooter · Action

DOOM
Shared: Action · Shooter · First-Person

Counter-Strike 2
Shared: Shooter · Action · First-Person

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

BioShock Infinite
Shared: Action · Shooter · First-Person

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

DOOM Eternal
Shared: Action · Shooter · First-Person

HROT
Shared: Boomer Shooter · Shooter · Action

DUSK
Shared: Boomer Shooter · Shooter · First-Person

Grand Theft Auto V Legacy
Shared: Action · Shooter · First-Person

Trepang2
Shared: Shooter · Action · First-Person

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

Black Mesa
Shared: Action · Shooter · First-Person

AMID EVIL
Shared: Boomer Shooter · Shooter · Action

Outlast
Shared: First-Person · Atmospheric · Action

METRO 2033 Redux
Shared: Action · Atmospheric · Shooter

DOOM 3
Shared: Action · First-Person · Shooter

Forgive Me Father
Shared: Boomer Shooter · Action · Shooter

Nightmare Reaper
Shared: Boomer Shooter · Roguelite · Shooter

SharpShooter3D
Shared: Boomer Shooter · Action · Shooter

METRO Last Light Redux
Shared: Action · Atmospheric · Shooter

DOOM 3
Shared: Action · Shooter · First-Person

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