Single-player games like Space Run Galaxy
Below are 11 single-player Steam games similar to Space Run Galaxy, 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 Space Run Galaxy page.
Ranked picks
- 1
Space Run
Single-player alternative to Space Run Galaxy — playable solo, no multiplayer required. Shares Strategy and Indie with Space Run Galaxy.
Space Run is a «real-time spaceship construction strategy game». Space Run takes the well-known Tower Defense-style gameplay and twists it, challenging you to manage and protect a spaceship and its cargo against the hazards of deep space!
- 2
AI War: Fleet Command
Single-player alternative to Space Run Galaxy — playable solo, no multiplayer required. Shares Strategy and Indie with Space Run Galaxy.
"You are outgunned. You are massively outnumbered. You must win." These are your orders. Humanity has already fought its war against the machines -- and lost. AI death squads stand watch over every planet and every wormhole, the few remaining human settlements are held captive in orbiting bubbles, and the AIs have turned their...
- 3
DG2: Defense Grid 2
Single-player alternative to Space Run Galaxy — playable solo, no multiplayer required. Shares Strategy and Indie with Space Run Galaxy.
Great strategy is timeless. Build, adapt, and defend across dynamic maps, solo or online - every session brings new strategies, new solutions, and new surprises. Now is the perfect time to enter the grid.
- 4
Unstoppable Gorg
Single-player alternative to Space Run Galaxy — playable solo, no multiplayer required. Shares Strategy and Indie with Space Run Galaxy.
Defend the solar system from fearsome aliens by sending satellites into orbit in revolutionary tower defense action!
- 5
Mars or Die!
Single-player alternative to Space Run Galaxy — playable solo, no multiplayer required. Shares Strategy and Indie with Space Run Galaxy.
Control two characters simultaneously! Survive, gather, collect upgrades, fight all sizes of one-eyed Martians, build defensible outposts and conquer Mars, in this glorious mix between roguelite and tower defense.
- 6
SHOOPER NOVA
Single-player alternative to Space Run Galaxy — playable solo, no multiplayer required. Shares Strategy and Indie with Space Run Galaxy.
Craft Your Ultimate Circular Fortress! Dive into SHOOPER NOVA, where you choose props and components to build a unique fortress. Unlock combos to shape your strategy and battle style. Become an unstoppable barrage machine and obliterate waves of enemies from all directions!
- 7
Particle Fleet: Emergence
Single-player alternative to Space Run Galaxy — playable solo, no multiplayer required. Shares Strategy and Indie with Space Run Galaxy.
Build and design your own fleets and stand opposed to the Particulate in this physics/strategy/RTS/fleet hybrid. Build partially destructible and self repairing ships that interact with enemies less controlled by some scripted logic and more driven by a real time massive physics particle simulation.
- 8
Immortal Defense
Single-player alternative to Space Run Galaxy — playable solo, no multiplayer required. Shares Strategy and Indie with Space Run Galaxy.
Immortal Defense is a story-driven tower defense game in which you give up your body and life to become an immortal "path defender", and defend your home world from destruction, forever. The game takes place over millions of years. Is there anything you would give up everything to defend?
- 9
Ravenswatch
Single-player alternative to Space Run Galaxy — playable solo, no multiplayer required.
Fallen heroes of old folk tales and legends: you are on the verge of a crucial battle against the Nightmare invading and corrupting your world. A roguelike action game from the creators of Curse of the Dead Gods©, playable solo or in online co-op.
- 10
Curse of the Dead Gods
Single-player alternative to Space Run Galaxy — playable solo, no multiplayer required.
You seek untold riches, eternal life, divine powers - it leads to this accursed temple, a seemingly-infinite labyrinth of bottomless pits, deadly traps, and monsters.
- 11
Masters of Anima
Single-player alternative to Space Run Galaxy — playable solo, no multiplayer required. Shares Strategy with Space Run Galaxy.
Delve into an original adventure and defy the forces of evil in strategic, action-packed battles. Summon and control large armies of up to 100 Guardians thanks to intuitive and innovative gameplay and make quick tactical decisions to prevail.