Games like Galaxy Annihilation
Games like Galaxy Annihilation include Cyberhunt, Star Saviors, Shooting Stars!, Deliver Us The Moon, and Starship Troopers: Extermination. We matched them by the tags players give Galaxy Annihilation on Steam (Action, Indie, Aliens, Space, and Shoot 'Em Up): closest matches first, and among equally close ones the better-known games.

Cyberhunt
Shared: Action · Indie · Shoot 'Em Up

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

Shooting Stars!
Shared: Action · Indie · Shoot 'Em Up

Deliver Us The Moon
Shared: Indie · Action · Space

Starship Troopers: Extermination
Shared: Action · Aliens · Indie

Trailmakers
Shared: Action · Space · Indie

EVERSPACE™
Shared: Action · Space · Indie

Heat Signature
Shared: Indie · Space · Action

Starblast
Shared: Action · Indie · Space

Chorus
Shared: Action · Indie · Space

Aliens: Fireteam Elite
Shared: Action · Aliens · Space

Aliens: Colonial Marines Collection
Shared: Action · Aliens · Space

Stellar 2D
Shared: Indie · Action · Shoot 'Em Up

Angels Fall First
Shared: Action · Indie · Space

Chicken Invaders 2
Shared: Action · Indie · Space

Skul: The Hero Slayer
Shared: Action · Indie

Space Pirates and Zombies
Shared: Action · Indie · Space

Sun Blast: Star Fighter
Shared: Action · Indie · Shoot 'Em Up

Aliens: Fireteam Elite 2
Shared: Action · Aliens · Space

Dead Space (2008)
Shared: Action · Space · Aliens

Space Pirates And Zombies 2
Shared: Action · Space · Indie

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

ZeroRanger
Shared: Indie · Action · Shoot 'Em Up

Let Them Come
Shared: Action · Indie · Aliens