Games like Asylum Nightmares
Games like Asylum Nightmares include Atomic Heart, Far Cry® 6, VLADiK BRUTAL, Resident Evil Requiem, and Half-Life 2. We matched them by the tags players give Asylum Nightmares on Steam (Action, Adventure, Action-Adventure, Shooter, and FPS): closest matches first, and among equally close ones the better-known games.

Atomic Heart
Shared: Adventure · Action · FPS

Far Cry® 6
Shared: Action-Adventure · FPS · Action

VLADiK BRUTAL
Shared: Action · Shooter · FPS

Resident Evil Requiem
Shared: Action · FPS · Action-Adventure

Half-Life 2
Shared: Action · FPS · Shooter

Left 4 Dead 2
Shared: FPS · Action · Shooter

Far Cry® 5
Shared: Action-Adventure · FPS · Shooter

BioShock Infinite
Shared: Action · Shooter · FPS

DOOM
Shared: Action · FPS · Shooter

Ready or Not
Shared: Shooter · FPS · Action

Far Cry 3
Shared: Action · Adventure · FPS

PUBG: BATTLEGROUNDS
Shared: Shooter · Action · FPS

Aimlabs
Shared: Action · FPS · Shooter

Black Mesa
Shared: Action · FPS · Shooter

Paper Dolls 2
Shared: FPS · Shooter · Action-Adventure

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

DOOM Eternal
Shared: Action · FPS · Shooter

Half-Life
Shared: FPS · Action · Shooter

Necromunda: Hired Gun
Shared: Action · Adventure · Shooter

Choo-Choo Charles
Shared: Shooter · Action-Adventure · Adventure

Half-Life: Blue Shift
Shared: Action · FPS · Shooter

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

Half-Life: Opposing Force
Shared: Action · FPS · Shooter

John Carpenter's Toxic Commando
Shared: Shooter · Action · FPS