Single-player games like Mars Horizon
Below are 16 single-player Steam games similar to Mars Horizon, 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 Horizon page.
Ranked picks
- 1
Kerbal Space Program
Single-player alternative to Mars Horizon — playable solo, no multiplayer required. Shares Indie and Simulation with Mars Horizon.
In Kerbal Space Program, take charge of the space program for the alien race known as the Kerbals. You have access to an array of parts to assemble fully-functional spacecraft that flies (or doesn’t) based on realistic aerodynamic and orbital physics.
- 2
Take On Mars
Single-player alternative to Mars Horizon — playable solo, no multiplayer required. Shares Simulation with Mars Horizon.
Take On Mars places you right in the middle of mankind’s most exciting undertaking. Start out in the seat of a rover operator, finish as the first human to have ever set foot on the Red Planet.
- 3
Terraformers
Single-player alternative to Mars Horizon — playable solo, no multiplayer required. Shares Strategy with Mars Horizon.
Terraform Mars in this turn-based colony builder and resource management game with roguelike elements. Explore the planet, develop spectacular cities, spread life and turn the Red Planet into a green one!
- 4
Surviving Mars
Single-player alternative to Mars Horizon — playable solo, no multiplayer required. Shares Strategy and Simulation with Mars Horizon.
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.
- 5
Rover Mechanic Simulator
Single-player alternative to Mars Horizon — playable solo, no multiplayer required. Shares Indie and Simulation with Mars Horizon.
As an Engineer - crew member of one of the first Mars colonies - you are responsible for repairing and maintaining Mars Rovers. In this advanced simulator you will learn the internal details of various Mars Rovers and their components.
- 6
Mars First Logistics
Single-player alternative to Mars Horizon — playable solo, no multiplayer required. Shares Indie and Simulation with Mars Horizon.
Build physically simulated rovers to transport awkwardly shaped cargo across the rugged terrain of Mars. Earn funds, unlock new parts, and use your ingenuity to help the Martians establish a new home. Playable solo or in online co-op!
- 7
Solar Expanse - Space Exploration Manager
Single-player alternative to Mars Horizon — playable solo, no multiplayer required. Shares Strategy and Indie with Mars Horizon.
Explore the Solar System. Mine and drop asteroids. Colonize and terraform. Lead the space race and compete with other corporations on your way to profit. Watch the expansion of human race over the centuries.
- 8
Juno: New Origins
Single-player alternative to Mars Horizon — playable solo, no multiplayer required. Shares Indie and Simulation with Mars Horizon.
Bring to life anything you can imagine from rockets and airplanes to cars and more. Automate them with a visual programming language. Explore 3D planets and make your own. Share your creations online. Complete contracts, conquer milestones, and unlock technology in the newly added Career Mode.
- 9
Warhammer 40,000: Boltgun
Single-player alternative to Mars Horizon — playable solo, no multiplayer required. Shares Indie with Mars Horizon.
Load up your Boltgun and unleash the awesome Space Marine arsenal to blast your way through an explosion of sprites, pixels and blood in a perfect blend of Warhammer 40,000, frenetic gameplay and the stylish visuals of 90’s retro shooters.
- 10
Starship Troopers: Ultimate Bug War!
Single-player alternative to Mars Horizon — playable solo, no multiplayer required. Shares Indie with Mars Horizon.
Lock and load into the Starship Troopers universe and join the Mobile Infantry in the most realistic depiction of war ever made! Experience an original story in this action-packed, first-person retro shooter. Would you like to know more?
- 11
Brewmaster: Beer Brewing Simulator
Single-player alternative to Mars Horizon — playable solo, no multiplayer required. Shares Simulation with Mars Horizon.
Brew your perfect beer in this relaxing home brewing sim. Use a realistic chemistry simulation to brew hoppy IPAs to creamy stouts. Customise your brewing space, create recipes and label your beer, unlock new equipment and enter competitions. Learn to brew, refine your craft and become a Brewmaster!
- 12
Dark Future: Blood Red States (Classic)
Single-player alternative to Mars Horizon — playable solo, no multiplayer required. Shares Strategy and Indie with Mars Horizon.
Step into the extraordinary, dystopian world of Dark Future, filled with danger, chaos and adventure. A game of both action and strategy unlike any other, featuring a unique time dilating command mode to help you make tactical decisions on the dangerous highways of this world.
- 13
Chainsaw Warrior (Classic)
Single-player alternative to Mars Horizon — playable solo, no multiplayer required. Shares Strategy and Indie with Mars Horizon.
Chainsaw Warrior from Games Workshop is the classic game for one strong-nerved player! It's 2032 and spatial warping has opened a hole into another dimension in the midst of the old municipal buildings at the heart of Manhattan. Bizarre and dangerous creatures are flooding into our dimension.
- 14
Ogre
Single-player alternative to Mars Horizon — playable solo, no multiplayer required. Shares Strategy and Indie with Mars Horizon.
The official adaptation of the legendary wargame from Steve Jackson Games. Engage in futuristic warfare with armored hovercraft, superheavy tanks, infantry, and giant cybernetic war machines called "Ogres".
- 15
Achtung! Cthulhu Tactics
Single-player alternative to Mars Horizon — playable solo, no multiplayer required. Shares Strategy and Indie with Mars Horizon.
Challenge the horrifying reign of Nazi terror and battle an immortal evil in Achtung! Cthulhu Tactics; a turn-based tactical strategy game set in the award-winning Achtung! Cthulhu universe.
- 16
Chainsaw Warrior: Lords of the Night (Classic)
Single-player alternative to Mars Horizon — playable solo, no multiplayer required. Shares Strategy and Indie with Mars Horizon.
Based on the 1987 Games Workshop classic, a battle vs zombies cultists & time! Fight against hordes of Aztec Zombies, and the clock, to save reality from Darkness. Lords of the Night introduces an upgraded combat system, new weapons, powers, equipment and unique mini bosses.