Single-player games like Belt Colony
Below are 8 single-player Steam games similar to Belt Colony, 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 Belt Colony page.
Ranked picks
- 1
Utopia Colony
Single-player alternative to Belt Colony — playable solo, no multiplayer required. Shares Strategy and Indie with Belt Colony.
The year is 2033. You, an ex-Marine with little opportunities left, have signed up with Utopia Arura, a large mining corporation on Mars. They have sent you to a location they have proposed but you have chosen for mining. Everything else is up to you.
- 2
Surviving Mars
Single-player alternative to Belt Colony — playable solo, no multiplayer required. Shares Strategy and Simulation with Belt Colony.
There will be challenges to overcome. Execute your strategy and improve your colony’s chances of survival while unlocking the mysteries of this alien world. Are you ready? Mars is waiting for you.
- 3
Stellar Settlers: Space Base Builder
Single-player alternative to Belt Colony — playable solo, no multiplayer required. Shares Strategy and Indie with Belt Colony.
Stellar Settlers is a chill space base/city builder and colony sim game. With unique vertical and horizontal base-building gameplay, settle on 10 hostile alien planets and build your own thriving colony. Get enough materials to build a physics-based Spaceship and try to escape from disasters.
- 4
Starpoint Gemini Warlords
Single-player alternative to Belt Colony — playable solo, no multiplayer required. Shares Strategy and Simulation with Belt Colony.
Strategy from the front lines! Starpoint Gemini Warlords combines 3rd person capital spaceship combat with 4X strategy and RPG gameplay elements. Build mighty war fleets and send them into battle or lead them into combat yourself. Become the Warlord and conquer the Gemini system!
- 5
Oxygen Not Included
Single-player alternative to Belt Colony — playable solo, no multiplayer required. Shares Indie and Simulation with Belt Colony.
Oxygen Not Included is a space-colony simulation game. Deep inside an alien space rock your industrious crew will need to master science, overcome strange new lifeforms, and harness incredible space tech to survive, and possibly, thrive.
- 6
RimWorld
Single-player alternative to Belt Colony — playable solo, no multiplayer required. Shares Strategy and Indie with Belt Colony.
A sci-fi colony sim driven by an intelligent AI storyteller. Generates stories by simulating psychology, ecology, gunplay, melee combat, climate, biomes, diplomacy, interpersonal relationships, art, medicine, trade, and more.
- 7
Ostranauts
Single-player alternative to Belt Colony — playable solo, no multiplayer required. Shares Indie and Simulation with Belt Colony.
Navigate your scrappy ship through the boneyard in search of valuable parts in abandoned vessels. Use salvage to upgrade your ship, or sell it for cash to pay down your mounting debt, or restock fuel, air, or food. Fly and role-play aboard your dream spaceship in this hardcore noir space-sim.
- 8
Mars Horizon
Single-player alternative to Belt Colony — playable solo, no multiplayer required. Shares Strategy and Indie with Belt Colony.
Lead a major space agency as you guide humanity to Mars in this strategy simulation game. Construct a base, design and build rockets, conduct missions throughout the Solar System, and write your own history of Space exploration. Created with support from the European Space Agency.