Games like Gun Devil
Games like Gun Devil include Celeste, SANABI, Super Meat Boy, Huntdown, and Momodora: Reverie Under The Moonlight. We matched them by the tags players give Gun Devil on Steam (Side Scroller, 2D Platformer, Hero Shooter, Shoot 'Em Up, and Precision Platformer): closest matches first, and among equally close ones the better-known games.
Celeste
Shared: Precision Platformer · 2D Platformer · Platformer
SANABI
Shared: 2D Platformer · Pixel Graphics · 2D
Super Meat Boy
Shared: Precision Platformer · 2D Platformer · Platformer
Huntdown
Shared: Side Scroller · Shoot 'Em Up · Shooter
Momodora: Reverie Under The Moonlight
Shared: 2D Platformer · Side Scroller · 2D
Anomaly Agent
Shared: Side Scroller · 2D Platformer · Platformer
Broforce
Shared: Side Scroller · Platformer · 2D
Warhammer 40,000: Shootas, Blood & Teef
Shared: Side Scroller · 2D Platformer · Shoot 'Em Up
Downwell
Shared: Precision Platformer · 2D Platformer · Platformer
Prince of Persia The Lost Crown
Shared: 2D Platformer · Side Scroller · Precision Platformer
Thomas Was Alone
Shared: Side Scroller · 2D Platformer · Platformer
VVVVVV
Shared: 2D Platformer · Precision Platformer · Platformer
Hitler is my crush
Shared: Side Scroller · Hero Shooter · Shoot 'Em Up
Touhou Luna Nights
Shared: Side Scroller · Bullet Hell · Platformer
Super Time Force Ultra
Shared: Side Scroller · 2D Platformer · Bullet Hell
Alex Jones: NWO Wars
Shared: 2D Platformer · Side Scroller · Shoot 'Em Up
Bō: Path of the Teal Lotus
Shared: Side Scroller · 2D Platformer · Precision Platformer
Webbed
Shared: 2D Platformer · Cute · Platformer
Rise & Shine
Shared: Side Scroller · 2D Platformer · Shoot 'Em Up
Rabi-Ribi
Shared: Bullet Hell · Side Scroller · Pixel Graphics
Skul: The Hero Slayer
Shared: Side Scroller · 2D · Platformer
Touhou Hero of Ice Fairy
Shared: Side Scroller · Bullet Hell · Platformer
Zombotron
Shared: 2D · Side Scroller · Shoot 'Em Up
Kero Blaster
Shared: Side Scroller · Shoot 'Em Up · Platformer