Games like Super Rebellion
Games like Super Rebellion include Bit Blaster XL, ZeroRanger, LUFTRAUSERS, Ikaruga, and Star Saviors. We matched them by the tags players give Super Rebellion on Steam (Aliens, Action, Indie, Shoot 'Em Up, and Bullet Hell): closest matches first, and among equally close ones the better-known games.

Bit Blaster XL
Shared: Shoot 'Em Up · Bullet Hell · Action

ZeroRanger
Shared: Indie · Shoot 'Em Up · Action

LUFTRAUSERS
Shared: Indie · Action · Bullet Hell

Ikaruga
Shared: Shoot 'Em Up · Action · Bullet Hell

Star Saviors
Shared: Action · Shoot 'Em Up · Indie

BLUE REVOLVER
Shared: Shoot 'Em Up · Indie · Action

Revolution Ace
Shared: Action · Shoot 'Em Up · Indie

Cuphead
Shared: Difficult · Indie · Bullet Hell

BALL x PIT
Shared: Action · Bullet Hell · Arcade

Nova Drift
Shared: Shoot 'Em Up · Bullet Hell · Arcade

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

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

DoDonPachi Resurrection
Shared: Shoot 'Em Up · Bullet Hell · Action

Sky Force Reloaded
Shared: Shoot 'Em Up · Bullet Hell · Arcade

Exit the Gungeon
Shared: Action · Indie · Arcade

Nex Machina
Shared: Action · Bullet Hell · Indie

Mushihimesama
Shared: Action · Shoot 'Em Up · Bullet Hell

Savant - Ascent
Shared: Action · Indie · Shoot 'Em Up

UBERMOSH Vol.5
Shared: Action · Indie · Arcade

Cyberhunt
Shared: Action · Indie · Shoot 'Em Up

Touhou Tenkuushou ~ Hidden Star in Four Seasons.
Shared: Bullet Hell · Shoot 'Em Up · Indie

Super Galaxy Squadron EX Turbo
Shared: Action · Shoot 'Em Up · Indie

Touhou Fuujinroku ~ Mountain of Faith.
Shared: Action · Indie · Bullet Hell

UBERMOSH:WRAITH
Shared: Action · Indie · Arcade