Single-player games like Planet Gemini
Below are 8 single-player Steam games similar to Planet Gemini, 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 Planet Gemini page.
Ranked picks
- 1
Stellar Shipyard
Single-player alternative to Planet Gemini — playable solo, no multiplayer required. Shares Strategy with Planet Gemini.
Stellar Shipyard is a space colony sandbox where you design modular ships and stations, and automate resource production using drones and workers. Let the automated systems fly even the most improvised designs. Face rival factions and threats solo, or alongside friends as allies or rivals.
- 2
Ghostorio
Single-player alternative to Planet Gemini — playable solo, no multiplayer required. Shares Strategy and Indie with Planet Gemini.
Build automated factories in a bright afterlife. Mine, belt, power, and produce at massive scale, then defend your work from the spirits it attracts. A third-person factory game of automation, base building, and tower defense.
- 3
Cosminers
Single-player alternative to Planet Gemini — playable solo, no multiplayer required. Shares Indie with Planet Gemini.
Cosminers is a 1-4 player co-op FPP sci-fi building and mining game with survival elements based on day/night cycle. As a space miner kill various aliens on procedurally-generated planet's undergrounds. Craft and upgrade your tools, weapons & base to get countless hours of thrilling gameplay.
- 4
Industronaut
Single-player alternative to Planet Gemini — playable solo, no multiplayer required. Shares Indie with Planet Gemini.
A survival engineering game where you build life support habitats, mine resources, and automate production chains on a radiation heavy planet. No rescue. No support. Just engineering.
- 5
Keep The Ammo Flowing
Single-player alternative to Planet Gemini — playable solo, no multiplayer required. Shares Strategy with Planet Gemini.
A top-down incremental logistics and tower-defense game. Mine resources, produce ammunition, build tracks toward the exit, and upgrade your mobile furnace and turret while defending it from underground swarms.
- 6
Oreguard: Mining Endeavors
Single-player alternative to Planet Gemini — playable solo, no multiplayer required. Shares Strategy and Indie with Planet Gemini.
Descend into the depths, extract valuable resources, and turn them into the engine of a growing industrial operation. Build underground infrastructure and process everything on the surface to expand your production and unlock increasingly powerful upgrades.
- 7
Elsewhere
Single-player alternative to Planet Gemini — playable solo, no multiplayer required. Shares Indie with Planet Gemini.
A sandbox crafting adventure with quests, magic, automation, and exploration. Gather resources, build your base, unlock new technologies, and shape your own path through a world full of secrets and progression. Inspired by classic Minecraft modpacks with many new and unique features.
- 8
TerraTech Worlds
Single-player alternative to Planet Gemini — playable solo, no multiplayer required. Shares Strategy and Indie with Planet Gemini.
TerraTech Worlds is an open world, build-craft adventure game, set on an uncharted alien world. Play solo or with friends, explore your surroundings, craft unique vehicles, construct automated bases, and battle your way through hazards and enemies to harness the power of your environment