Games like COTTON REBOOT!
Games like COTTON REBOOT! include Terminator 2D: NO FATE, Vampire Survivors, Exit the Gungeon, Broforce, and Huntdown. We matched them by the tags players give COTTON REBOOT! on Steam (Action, Arcade, Shooter, Bullet Hell, and 2D Platformer): closest matches first, and among equally close ones the better-known games.

Terminator 2D: NO FATE
Shared: Arcade · Action · 2D Platformer

Vampire Survivors
Shared: Bullet Hell · 2D · Arcade

Exit the Gungeon
Shared: Arcade · Action · Bullet Hell

Broforce
Shared: Action · 2D · Shooter

Huntdown
Shared: Action · Shooter · Side Scroller

Alex Jones: NWO Wars
Shared: Action · Arcade · Shooter

Bit Blaster XL
Shared: Bullet Hell · Shooter · Arcade

METAL SLUG
Shared: Action · Arcade · Side Scroller

LUFTRAUSERS
Shared: Arcade · Action · Bullet Hell

METAL SLUG 3
Shared: Arcade · Action · Side Scroller

Planes, Bullets and Vodka
Shared: Action · Arcade · Bullet Hell

Neptunia Shooter
Shared: Action · Bullet Hell · Arcade

BALL x PIT
Shared: Action · Arcade · Bullet Hell

METAL SLUG X
Shared: Action · Arcade · 2D

Mirage Feathers
Shared: Bullet Hell · Cute · Shooter

Contra: Operation Galuga
Shared: Action · Arcade · Shooter

DRAINUS
Shared: Action · Shooter · Bullet Hell

SANABI
Shared: Action · 2D Platformer · Pixel Graphics

Momodora: Reverie Under The Moonlight
Shared: 2D Platformer · Side Scroller · Pixel Graphics

Door Kickers: Action Squad
Shared: Action · 2D Platformer · Shooter

Contra Anniversary Collection
Shared: Action · Side Scroller · Shooter

Nitro Express
Shared: Shooter · 2D Platformer · Side Scroller

Rabi-Ribi
Shared: Bullet Hell · Anime · Cute

Commando Collection
Shared: Action · Shooter · Arcade