Single-player games like Stars Online
Below are 9 single-player Steam games similar to Stars Online, 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 Stars Online page.
Ranked picks
- 1
Collapsion
Single-player alternative to Stars Online — playable solo, no multiplayer required. Shares Action and Indie with Stars Online.
When a black hole generates enough strength to destroy the entire universe, it's called Collapsion. It's up to you to defend the universe for as long as possible to stop Collapsion from happening in this Arcade Shooter!
- 2
Cosmotroid
Single-player alternative to Stars Online — playable solo, no multiplayer required. Shares Action and Indie with Stars Online.
Escape from the asteroid X-474 which has been invaded by aliens. Take your weapons and destroy every enemy who tries to stop you in this amazing arcade style third person shooter game full of action, creatures and explosions.
- 3
Cosmonator
Single-player alternative to Stars Online — playable solo, no multiplayer required. Shares Action and Indie with Stars Online.
Cosmonator is an 'RPG-em-up': a hybrid of classic fast-paced top-down shoot-em-up action infused with deep character building elements. Build up your own unique alien-killing machine to avenge the destruction of planet Earth!
- 4
The Unknown
Single-player alternative to Stars Online — playable solo, no multiplayer required. Shares Indie and Adventure with Stars Online.
Aboard a small spaceship, you embark on an exploration, daring to face the threats of the universe. Activate your spaceship and uncover the hidden secrets of this vast cosmos.
- 5
ShootyCraft
Single-player alternative to Stars Online — playable solo, no multiplayer required. Shares Action and Indie with Stars Online.
Massive online space battles with building and crafting. Up to 100 players in an arena. Solo and team game modes.
- 6
Xentron Attack
Single-player alternative to Stars Online — playable solo, no multiplayer required. Shares Action and Indie with Stars Online.
Xentron Attack is a multi-directional shooter. The evil alien forces called Xentron have invaded your galaxy and spreading dangerous meteors and missiles in the space. Fight with smart enemies who calculates your movements. Turn your ship precisely and use the borderless space wisely.
- 7
The ordinary case of Margaret Luoni
Single-player alternative to Stars Online — playable solo, no multiplayer required. Shares Indie and Adventure with Stars Online.
The ordinary case of Margaret Luoni is a sci-fi detective game with a deep story. Help Detective Dirk understand what happened, explore a new futuristic world. There are no obvious solutions here, find your own approach to witnesses and look for hidden places and clues to discovery.
- 8
Void Vikings
Single-player alternative to Stars Online — playable solo, no multiplayer required. Shares Action and Indie with Stars Online.
Void Vikings is an arcade style top down space shooter where intense action is the focus and choosing the right education could pay off. Smartly manage your Space Bucks in order to destroy your student loans before you die. If you succeed your score could sing your praises through all of Valhalla.
- 9
Terrarium II
Single-player alternative to Stars Online — playable solo, no multiplayer required. Shares Indie and Adventure with Stars Online.
Terrarium II is a peaceful sandbox about exploring nature, collecting plants, and building your own garden. No enemies, no pressure—just a calm world where you can grow, craft, and create at your own pace.