Single-player games like Planetoid
Below are 8 single-player Steam games similar to Planetoid, 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 Planetoid page.
Ranked picks
- 1
Astronaut Assault
Single-player alternative to Planetoid — playable solo, no multiplayer required. Shares Action and Strategy with Planetoid.
Dive into Astronaut Assault, a third-person Sci-Fi tower defense game, and battle against relentless enemy waves in diverse arena settings. Arm yourself with an array of turrets, traps, and gadgets to halt, hinder, and outmaneuver your foes.
- 2
Celestial Command
Single-player alternative to Planetoid — playable solo, no multiplayer required. Shares Action and Strategy with Planetoid.
Mine asteroids, salvage space debris, design your own small or massive spacecraft using individual functional components, complete missions, and engage in battles against enemies in a vast galaxy with realistic physics based on orbital mechanics or in a classic physics mode.
- 3
Dig or Die
Single-player alternative to Planetoid — playable solo, no multiplayer required. Shares Action and Strategy with Planetoid.
Crash land on a hostile planet where you'll have to build the strongest defenses if you wish to live to escape from it. But be warned... this planet is merciless. Build strong, and smart; else physics may flood or destroy your only hopes of survival.
- 4
Orbitect
Single-player alternative to Planetoid — playable solo, no multiplayer required. Shares Action and Strategy with Planetoid.
Space debris is out of control! Craft a station to take out the trash in this construction roguelite mashup.
- 5
Automate Defend Repeat
Single-player alternative to Planetoid — playable solo, no multiplayer required. Shares Action and Strategy with Planetoid.
Automate, Defend, Repeat: A combination of factory management and tower defense strategy. Build a planet-dominating factory, defend it from disgruntled resource-carrying monsters, and defeat a total of 6 bosses. Once you have done that, select a New Game + modifier and do it again!
- 6
CleanFall
Single-player alternative to Planetoid — playable solo, no multiplayer required. Shares Action and Strategy with Planetoid.
CleanFall is a survival rogue-like that prizes player freedom and creativity. Build mobile death machines to fight off ravenous hordes, craft and alchemize gun turrets, and tunnel through subterranean ecosystems crawling with nameless horrors.
- 7
Habitat
Single-player alternative to Planetoid — playable solo, no multiplayer required. Shares Action and Strategy with Planetoid.
Habitat is a physics-based space game where you build, fly, and fight with whatever you can find out in space. Upgrade and arm your creations with weapons and structures you find in orbit, fly and explore using rocket physics.Battle deadly enemies in Campaign Mode to save humanity or explore Sandbox Mode for true creative control.
- 8
Creeper World 4
Single-player alternative to Planetoid — playable solo, no multiplayer required. Shares Action and Strategy with Planetoid.
The unstoppable fluid enemy has returned and destroyed every world in its path! Defend against Creeper as it floods across the 3D terrain in this real time strategy game where the enemy is a fluid.