Single-player games like MARS
Below are 9 single-player Steam games similar to MARS, 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 MARS page.
Ranked picks
- 1
Here Comes The Swarm
Single-player alternative to MARS — playable solo, no multiplayer required. Shares Strategy and Simulation with MARS.
Here Comes the Swarm is a survival RTS with a pause button! Create your strategy, build, manage, and defend your settlements at your own pace. Take the fight to the hive mind and lead expeditions to deliver a deadly blow and eradicate your foes. Will you reclaim Ulora from the relentless Swarm?
- 2
Surviving Mars
Single-player alternative to MARS — playable solo, no multiplayer required. Shares Strategy and Simulation with MARS.
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 MARS — playable solo, no multiplayer required. Shares Strategy and Simulation with MARS.
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
Gold Gold Adventure Gold
Single-player alternative to MARS — playable solo, no multiplayer required. Shares Strategy and Simulation with MARS.
In this world, it’s all about the gold! Use it to build up a fantasy town, recruit heroes, give quests, raise a Godbeast, cast powerful spells, and expand your influence—all one gold coin at a time.
- 5
Ground of Aces
Single-player alternative to MARS — playable solo, no multiplayer required. Shares Strategy and Simulation with MARS.
Take command of a remote military air base during World War II. Build your own airfield, manage iconic aircraft and oversee your crew’s well-being. Prepare them against air raids and send your pilots on dangerous missions. Survive and help your nation win the war!
- 6
After Long Night
Single-player alternative to MARS — playable solo, no multiplayer required. Shares Strategy and Simulation with MARS.
After Long Night is a sandbox survival RTS. Build and fortify your base, scavenge every corner for vital resources, craft deadly weapons, and raise a militia to fight off relentless zombie hordes that strike every night. In this world, scavenging isn't just survival—it's strategy, power and war.
- 7
Whiskerwood
Single-player alternative to MARS — playable solo, no multiplayer required. Shares Strategy and Simulation with MARS.
Establish a home for your industrious mice under the oppressive paw of your cat overlords in this city builder featuring complex simulations, intricate production chains, and the age-old rivalry between cat and mouse.
- 8
Northgard: Definitive Edition
Single-player alternative to MARS — playable solo, no multiplayer required. Shares Strategy and Simulation with MARS.
Northgard: Definitive Edition is a critically acclaimed real-time strategy game based on Norse mythology. Lead your clan, uncover the secrets of a mysterious newfound continent and defeat your enemies to conquer the Throne!
- 9
Cyborg City
Single-player alternative to MARS — playable solo, no multiplayer required.
Year 2225. Step into Cyborg City, a cyborg-apocalyptic world where Jax fights to survive from the Scrapyard up to Cyborg City. Using Bullet Time, Jetpack, and Upgrades to destroy enemies, he is avenging his family and saving the girl he loves in this third-person shooter.