Games like Amanojaku Nightmare
Games like Amanojaku Nightmare include BioShock Infinite, Skul: The Hero Slayer, OneShot, Broforce, and KovaaK's. We matched them by the tags players give Amanojaku Nightmare on Steam (Action, Shooter, Shoot 'Em Up, Cute, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

BioShock Infinite
Shared: Action · Shooter · Singleplayer

Skul: The Hero Slayer
Shared: Action · Pixel Graphics · Indie

OneShot
Shared: Pixel Graphics · Cute · Indie

Broforce
Shared: Action · Pixel Graphics · Shooter

KovaaK's
Shared: Action · Shooter · Indie

DRAINUS
Shared: Action · Shoot 'Em Up · Shooter

LUFTRAUSERS
Shared: Action · Indie · Pixel Graphics

Hotline Miami
Shared: Action · Pixel Graphics · Indie

Undertale
Shared: Pixel Graphics · Multiple Endings · Indie

Mirage Feathers
Shared: Cute · Shoot 'Em Up · Shooter

Touhou Juuouen 〜 Unfinished Dream of All Living Ghost.
Shared: Action · Shoot 'Em Up · Shooter

My Friend Pedro
Shared: Action · Shooter · Indie

Huntdown
Shared: Shooter · Action · Pixel Graphics

Touhou Kouryudou ~ Unconnected Marketeers.
Shared: Action · Shoot 'Em Up · Shooter

Call of Duty®
Shared: Shooter · Action · Singleplayer

Planes, Bullets and Vodka
Shared: Action · Shoot 'Em Up · Shooter

Bright Memory: Infinite
Shared: Action · Shooter · Indie

Pixel Gun 3D: PC Edition
Shared: Shooter · Pixel Graphics · Action

Grand Theft Auto V Legacy
Shared: Action · Shooter · Singleplayer

ZeroRanger
Shared: Shoot 'Em Up · Action · Indie

POSTAL: Brain Damaged
Shared: Action · Shooter · Pixel Graphics

Touhou Koumakyou: New Classic - the Embodiment of Scarlet Devil
Shared: Shoot 'Em Up · Action · Shooter

Warhammer 40,000: Boltgun
Shared: Shooter · Action · Pixel Graphics

Gensokyo Night Festival
Shared: Action · Pixel Graphics · Indie