Games like Starship Annihilator
Games like Starship Annihilator include Cyberhunt, Skul: The Hero Slayer, Savant - Ascent, ZeroRanger, and LUFTRAUSERS. We matched them by the tags players give Starship Annihilator on Steam (Indie, Action, and Shoot 'Em Up): closest matches first, and among equally close ones the better-known games.

Cyberhunt
Shared: Indie · Action · Shoot 'Em Up

Skul: The Hero Slayer
Shared: Indie · Action

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

ZeroRanger
Shared: Indie · Shoot 'Em Up · Action

LUFTRAUSERS
Shared: Indie · Action · Shoot 'Em Up

Hotline Miami
Shared: Action · Indie

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

Hades
Shared: Indie · Action

Touhou Fuujinroku ~ Mountain of Faith.
Shared: Indie · Action · Shoot 'Em Up

My Friend Pedro
Shared: Indie · Action

Jets'n'Guns 2
Shared: Indie · Action · Shoot 'Em Up

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

DRAINUS
Shared: Action · Indie · Shoot 'Em Up

Octogeddon
Shared: Action · Indie · Shoot 'Em Up

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

KovaaK's
Shared: Action · Indie

Zombotron
Shared: Action · Indie · Shoot 'Em Up

Bright Memory: Infinite
Shared: Action · Indie

Touhou Blooming Chaos 2
Shared: Action · Indie · Shoot 'Em Up

Guns, Gore & Cannoli
Shared: Action · Indie · Shoot 'Em Up

TouHou Makuka Sai ~ Fantastic Danmaku Festival Part II
Shared: Indie · Shoot 'Em Up · Action

Cube Destroyer
Shared: Indie · Action · Shoot 'Em Up

State of Anarchy
Shared: Indie · Action · Shoot 'Em Up

The Void Rains Upon Her Heart
Shared: Indie · Shoot 'Em Up · Action