Games like Super Psy Penguin
Games like Super Psy Penguin include LUFTRAUSERS, KovaaK's, Bright Memory: Infinite, Revolution Ace, and Epido. We matched them by the tags players give Super Psy Penguin on Steam (Shoot 'Em Up, Action, Shooter, Arcade, and Singleplayer): closest matches first, and among equally close ones the better-known games.
LUFTRAUSERS
Shared: Action · Arcade · Indie
KovaaK's
Shared: Action · Shooter · Indie
Bright Memory: Infinite
Shared: Action · Shooter · Singleplayer
Revolution Ace
Shared: Shoot 'Em Up · Action · Shooter
Epido
Shared: Shoot 'Em Up · Action · Sexual Content
Planes, Bullets and Vodka
Shared: Action · Shoot 'Em Up · Arcade
Ikaruga
Shared: Shoot 'Em Up · Arcade · Action
Nova Drift
Shared: Shoot 'Em Up · Arcade · Shooter
DRAINUS
Shared: Shoot 'Em Up · Action · Shooter
Project Wingman
Shared: Action · Singleplayer · Indie
Bit Blaster XL
Shared: Shoot 'Em Up · Shooter · Arcade
Sky Force Reloaded
Shared: Shoot 'Em Up · Arcade · Action
Star Saviors
Shared: Shoot 'Em Up · Action · Indie
ZeroRanger
Shared: Shoot 'Em Up · Action · Indie
BALL x PIT
Shared: Action · Arcade · Shoot 'Em Up
Touhou Kouryudou ~ Unconnected Marketeers.
Shared: Shoot 'Em Up · Action · Shooter
Touhou Kinjoukyou ～ Fossilized Wonders.
Shared: Shoot 'Em Up · Shooter · Action
AHEGAL
Shared: Shoot 'Em Up · Nudity · Arcade
Exit the Gungeon
Shared: Action · Arcade · Indie
Cube Destroyer
Shared: Action · Shoot 'Em Up · Indie
Sine Mora
Shared: Shoot 'Em Up · Action · Indie
Vampire Survivors
Shared: Indie · Bullet Hell · Singleplayer
Touhou Koumakyou: New Classic - the Embodiment of Scarlet Devil
Shared: Shoot 'Em Up · Action · Bullet Hell
My Friend Pedro
Shared: Action · Shooter · Indie