Single-player games like Crystal Cosmos
Below are 8 single-player Steam games similar to Crystal Cosmos, 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 Crystal Cosmos page.
Ranked picks
- 1
Defender's Squad: The Last Ride
Single-player alternative to Crystal Cosmos — playable solo, no multiplayer required. Shares Action and Indie with Crystal Cosmos.
Defender's Squad is a sci-fi vertical scrolling shooter 2D that combines 7 different levels. Play Solo and pick one of the 3 ships to kill enemies and save the earth from aliens.
- 2
X-Force Under Attack
Single-player alternative to Crystal Cosmos — playable solo, no multiplayer required. Shares Action and Indie with Crystal Cosmos.
X-Force Under Attack brings back all the charm of shmup games from the 80's/90's. It's a frenetic and chaotic space shooter with insane battles against extremely difficult bosses.
- 3
Spacebase19
Single-player alternative to Crystal Cosmos — playable solo, no multiplayer required. Shares Action and Indie with Crystal Cosmos.
Defend Spacebase 19 from the asteroids swarming down on the station! Shoot down waves of stones and equip different powerful weapons. How many waves can you last? A simple nostalgic retro arcade turret defense shooter.
- 4
Future Knight
Single-player alternative to Crystal Cosmos — playable solo, no multiplayer required. Shares Action and Indie with Crystal Cosmos.
Frenetic action and LCD aesthetic! In this 2D Shoot 'Em Up, switch between a robot hero and his benign tumor to stop a bizarre cult. You have 8 hours to save humanity's memory: defeat grotesque bosses, ride the skies on your Future Board, and master the chaos in a retro-futuristic Tokyo.
- 5
Infinity Wings - Scout & Grunt
Single-player alternative to Crystal Cosmos — playable solo, no multiplayer required. Shares Action and Indie with Crystal Cosmos.
Infinity Wings - Scout & Grunt Take control of your chosen fighter (either Scout or Grunt) in this side scrolling shooter.
- 6
Metal Crisis
Single-player alternative to Crystal Cosmos — playable solo, no multiplayer required. Shares Action and Indie with Crystal Cosmos.
METAL CRISIS is a side-scrolling shoot 'em up inspired by 3D space shooters of the 90s. Pilot the most advanced ship Earth has created capable of acquiring enemy weapons as you battle through hordes of fighters and hulking bosses in it's war against the space colonies rebellion.
- 7
VectorSmash!
Single-player alternative to Crystal Cosmos — playable solo, no multiplayer required. Shares Action and Indie with Crystal Cosmos.
VectorSmash is a fast-paced retro arcade space shooter. Pilot your artillery battery to defend the planet, blasting waves of incoming meteorites and using warps to survive. Classic 80s action with crisp vector visuals, simple controls, and addictive high-score chasing!
- 8
Devastation - Annihilate the Alien Race
Single-player alternative to Crystal Cosmos — playable solo, no multiplayer required. Shares Action and Indie with Crystal Cosmos.
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.