Single-player games like Cubersum
Below are 9 single-player Steam games similar to Cubersum, 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 Cubersum page.
Ranked picks
- 1
Wayfallen
Single-player alternative to Cubersum — playable solo, no multiplayer required. Shares Simulation with Cubersum.
A galaxy with its own economy, its own wars, and no reason to wait for you. Trade, mine, fight, and salvage a living - alone on the rim, or at the head of an empire the great powers can't ignore. A single-player space sandbox that never stops moving.
- 2
9.8
Single-player alternative to Cubersum — playable solo, no multiplayer required. Shares Indie and Simulation with Cubersum.
A 2D space agency simulator where every object follows the same orbital physics. Land on moons, build colonies, deploy satellites, and reshape entire planetary systems. Deorbit a moon if you want.
- 3
Starshapes
Single-player alternative to Cubersum — playable solo, no multiplayer required. Shares Indie and Casual with Cubersum.
A calm and highly satisfying puzzle game about connecting shapes to create 3D star constellations.
- 4
Coasteroid
Single-player alternative to Cubersum — playable solo, no multiplayer required. Shares Indie and Simulation with Cubersum.
Build stellar rollercoasters across alien worlds, carve tunnels through planets, and launch trains into orbit. Customize every track element, scenery decoration, and environment before subjecting riders to the forces of the universe! The galaxy is your theme park!
- 5
Deep Space Exploitation
Single-player alternative to Cubersum — playable solo, no multiplayer required. Shares Indie and Simulation with Cubersum.
Deep Space Exploitation is a space mining game featuring 2D physics, fully destructible asteroids, and a story of survival under an exploitative corporation. Use your equipment wisely, upgrade your ship, and make difficult decisions to secure your future!
- 6
Alliance Peacefighter
Single-player alternative to Cubersum — playable solo, no multiplayer required. Shares Indie and Simulation with Cubersum.
A linear, story-driven space sim in the style of 90s classics like X-Wing and Wing Commander. As a newly qualified Alliance pilot, you find yourself caught up in a plot to break the fragile peace between two galactic superpowers.
- 7
Mars Horizon
Single-player alternative to Cubersum — playable solo, no multiplayer required. Shares Indie and Simulation with Cubersum.
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.
- 8
Avorion
Single-player alternative to Cubersum — playable solo, no multiplayer required. Shares Indie and Simulation with Cubersum.
A procedural co-op space sandbox where players can build their own space ships out of dynamically scalable blocks. Fight epic space battles, explore, mine, trade, wage wars and build your own empire to save your galaxy from being torn apart by an unknown enemy.
- 9
Creaworm
Single-player alternative to Cubersum — playable solo, no multiplayer required. Shares Indie with Cubersum.
In this short indie puzzle game you play as a little bookworm with a big dream. Find morsels of lost knowledge across the maze, craft spells to pass doors, and find the way to the land of dreams.