Single-player games like Space Commanders: Solar System
Below are 8 single-player Steam games similar to Space Commanders: Solar System, 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 Commanders: Solar System page.
Ranked picks
- 1

Untethered
Single-player alternative to Space Commanders: Solar System — playable solo, no multiplayer required. Shares Adventure and Simulation with Space Commanders: Solar System.
Untethered is a space survival-sandbox set in our own cosmic backyard. Explore zero-gravity environments, build and operate realistic space stations, and fight to stay alive in the unforgiving realm of deep space.
- 2

Lunar Impact
Single-player alternative to Space Commanders: Solar System — playable solo, no multiplayer required. Shares Adventure and Simulation with Space Commanders: Solar System.
Go to the Moon to explore its harsh nature and mysterious anomalies. Build your own lunar base, craft equipment, extract valuable resources and make many discoveries. Overcome the challenges of extreme lunar conditions, an oxygen-free atmosphere and much more unknown...
- 3

MORS
Single-player alternative to Space Commanders: Solar System — playable solo, no multiplayer required. Shares Adventure and Simulation with Space Commanders: Solar System.
Build an automated factory on a true-scale Mars streamed from real NASA terrain. Mine, smelt and belt resources, run trains between outposts, master chemistry, and grow from a lone lander into a planet-spanning industry while the real Martian weather does its worst.
- 4

Starvector
Single-player alternative to Space Commanders: Solar System — playable solo, no multiplayer required. Shares Adventure with Space Commanders: Solar System.
Eat a snack while you watch an entire planet burn in your image.
- 5

Starship Colony
Single-player alternative to Space Commanders: Solar System — playable solo, no multiplayer required. Shares Adventure and Simulation with Space Commanders: Solar System.
A deep starship colony sim. Build your starship, manage air, water, food, fuel, energy, temperature and psychology to keep your crew alive across vast distances. Closed-loop system in space. Mining, wiring, plumbing, in-ship factory, (alien?) radio signals & translation, diplomacy, combat, and more.
- 6

The Mystery Of The Moon
Single-player alternative to Space Commanders: Solar System — playable solo, no multiplayer required. Shares Adventure and Simulation with Space Commanders: Solar System.
The game of survival and construction on the surface of the moon. Learn to build a base on the surface of the moon, maintain survival, explore and discover the secrets inside the moon, and solve abnormal problems.
- 7

Android Simulator
Single-player alternative to Space Commanders: Solar System — playable solo, no multiplayer required. Shares Adventure and Simulation with Space Commanders: Solar System.
Android Simulator is a futuristic FPS game in which you take the role of an android who is in charge of a spaceship colony. Keep a firm hand on the flight route and manage the right water balance for plants, oxygen level, and spacecraft parameters to securely deliver the colonizers.
- 8

Starbase Gunship
Single-player alternative to Space Commanders: Solar System — playable solo, no multiplayer required. Shares Simulation with Space Commanders: Solar System.
Starbase Gunship places you in the seat of a weapons officer on a state-of-the-art Gunship as you defend a remote outpost from an Alien invasion fleet. With access to laser cannons, missiles, miniguns and nuclear warheads, you are the last line of defense between humanity and the alien invaders.