Single-player games like Cosmic Guardians
Below are 8 single-player Steam games similar to Cosmic Guardians, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Cosmic Guardians page.
Ranked picks
- 1
Devastation - Annihilate the Alien Race
Single-player alternative to Cosmic Guardians — playable solo, no multiplayer required. Shares Action and Indie with Cosmic Guardians.
Devastation - Annihilate the Alien Race, is a 2D, dual stick shoot em' up, bullet hell, arcade game. Tear up hordes of aliens with skill based game play, bombs & upgrades to obliterate everything!. Gun down 11 massive bosses, bank insane score on the leaderboards & overcome clouds of enemy fire.
- 2
Viral Reload EX
Single-player alternative to Cosmic Guardians — playable solo, no multiplayer required. Shares Action and Indie with Cosmic Guardians.
Viral Reload EX is a shoot-em-up with a dash mechanic where you shrink down to fight infections at a microscopic scale! Can you defeat the evil Kyle Kaboom before he destroys the moon?
- 3
Vortex Attack EX
Single-player alternative to Cosmic Guardians — playable solo, no multiplayer required. Shares Action and Indie with Cosmic Guardians.
Galaxy is in danger with hostile ships swarming from the opening vortex. Blast enemies with huge variety of upgradeable ships. Frantic arcade shooter featuring world leaderboards and fun multiplayer mode will keep you playing until all ships are unlocked; galaxies saved. WARNING:VERY_ADDICTIVE
- 4
Star Legion
Single-player alternative to Cosmic Guardians — playable solo, no multiplayer required. Shares Action and Indie with Cosmic Guardians.
Star Legion is a local co-op top-down shooter where you battle rogue machines in intense missions. Craft gear, survive hostile incursions, and reclaim sectors to spread the glory of the intergalactic Roman Empire.
- 5
Topspace
Single-player alternative to Cosmic Guardians — playable solo, no multiplayer required. Shares Action and Indie with Cosmic Guardians.
A topdown bullet hell game where you control a spaceship and fight waves of asteroids and enemy spaceships.
- 6
Atria Valkyrie
Single-player alternative to Cosmic Guardians — playable solo, no multiplayer required. Shares Action and Indie with Cosmic Guardians.
Operate disc hovercrafts that absorb enemy bullets to charge up your weapon. This is a vertical STG game. Correct timing of your attack and choice of bullet determines your survival or defeat.
- 7
Airstrife: Assault of the Aviators
Single-player alternative to Cosmic Guardians — playable solo, no multiplayer required. Shares Action and Indie with Cosmic Guardians.
Use Aileron Rolling or Evading your enemies' attacks while having a realistic damage system. Use different planes with upgradable parts and numerous weapons you can mount to your planes to destroy your enemies. Fly solo or play with your friends and enjoy local coop. A modern re-invented classic.
- 8
Super Rebellion
Single-player alternative to Cosmic Guardians — playable solo, no multiplayer required. Shares Action and Indie with Cosmic Guardians.
The humanity succumbed against the power of a aliens intergalactic empire, but managed to organize and establish a resistance army. Join the rebellious seekers of peace and help them defeat the evil that haunts the Earth.