Games like Super Captain 3D
Games like Super Captain 3D include Vampire Survivors, LUFTRAUSERS, ZeroRanger, Planes, Bullets and Vodka, and Bit Blaster XL. We matched them by the tags players give Super Captain 3D on Steam (Indie, Shoot 'Em Up, Bullet Hell, Retro, and Action): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Bullet Hell · Indie · 2D

LUFTRAUSERS
Shared: Indie · Bullet Hell · Action

ZeroRanger
Shared: Indie · Shoot 'Em Up · Bullet Hell

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

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

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

BALL x PIT
Shared: Action · Bullet Hell · Arcade

Cyberhunt
Shared: Indie · Shoot 'Em Up · Action

Exit the Gungeon
Shared: Indie · Arcade · Bullet Hell

Star Saviors
Shared: Shoot 'Em Up · Bullet Hell · Indie

Broforce
Shared: Action · Indie · 2D

UFO 50
Shared: Indie · Retro · Action

DRAINUS
Shared: Shoot 'Em Up · Indie · Action

Shovel Knight: Treasure Trove
Shared: Indie · Retro · Pixel Graphics

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

Pizza Tower
Shared: Indie · Action · Pixel Graphics

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

Revolution Ace
Shared: Shoot 'Em Up · Indie · Bullet Hell

BLUE REVOLVER
Shared: Shoot 'Em Up · Indie · Bullet Hell

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

Jet Lancer
Shared: Indie · Action · Shoot 'Em Up

Undertale
Shared: Indie · Pixel Graphics · 2D

UBERMOSH
Shared: Indie · Action · Pixel Graphics

UBERMOSH Vol.5
Shared: Indie · Action · Retro