Single-player games like AlterSpace
Below are 8 single-player Steam games similar to AlterSpace, 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 AlterSpace page.
Ranked picks
- 1
Humanity Lost
Single-player alternative to AlterSpace — playable solo, no multiplayer required. Shares Adventure and RPG with AlterSpace.
Will you save humanity? You are on a mission to find a new planet for humans to inhabit. In this story driven FPS space opera you will explore open world planets, find weapons, upgrade your character, and befriend alien species.
- 2
Stellar Overload
Single-player alternative to AlterSpace — playable solo, no multiplayer required. Shares Adventure and RPG with AlterSpace.
Robots invaded the peaceful planet Merx. Go on an adventure to free your world from them. Stellar Overload is a 3D open-world, blocks-based, FPS, adventure game.
- 3
Rebel Galaxy Outlaw
Single-player alternative to AlterSpace — playable solo, no multiplayer required. Shares Adventure with AlterSpace.
Out of cash, out of luck, out on the fringe. Juno Markev has a killer to tail, a debt to pay, and more trouble headed her way. Rebel Galaxy Outlaw takes place in a greasy, blue-collar world of outlaws, truckers, cops and thieves.
- 4
GRAV
Single-player alternative to AlterSpace — playable solo, no multiplayer required. Shares Adventure and RPG with AlterSpace.
GRAV is a sand box experience where you explore a multitude of planets, hunt strange alien creatures, build and defend outposts, craft weapons and armor, and attempt to survive against other players in a hostile environment.
- 5
Fargone
Single-player alternative to AlterSpace — playable solo, no multiplayer required. Shares RPG and Early Access with AlterSpace.
Fargone is an RPG-based survival game with a strong focus on creating a living, breathing world through dynamic events, and NPC interactions. Set in a fictional land known only as The Barrens, you must survive by any means, whether that be alone or by allying yourself with a faction.
- 6
Osiris: New Dawn
Single-player alternative to AlterSpace — playable solo, no multiplayer required. Shares Adventure and RPG with AlterSpace.
Osiris: New Dawn is an unforgiving near future space survival game with a cinematic feel and elements of horror. Play as a Mission Specialist in single or multiplayer to build your planetary base, pilotable vehicles, and controllable drones as you explore a dangerous solar system far from Earth.
- 7
Starpoint Gemini 2
Single-player alternative to AlterSpace — playable solo, no multiplayer required. Shares RPG with AlterSpace.
Captain your own space ship and roam the galaxy in 3D in this tactical space simulator with tons of RPG depth ! Space has never looked so inviting - but images can betray...It has been two years since the end of the second Gemini war, the situation in the wartorn system is further from resolution than ever.
- 8
Underspace
Single-player alternative to AlterSpace — playable solo, no multiplayer required. Shares Adventure and RPG with AlterSpace.
The spiritual successor to Freelancer with a Lovecraftian, sandbox RPG twist. Explore a vast handmade universe with Day 1 mod support and a planned PvP/co-op multiplayer on the Early Access roadmap. You're going to need a bigger ship.