Single-player games like The Mystery Of The Moon
Below are 8 single-player Steam games similar to The Mystery Of The Moon, 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 The Mystery Of The Moon page.
Ranked picks
- 1
Rebel Galaxy Outlaw
Single-player alternative to The Mystery Of The Moon — playable solo, no multiplayer required. Shares Action and Indie with The Mystery Of The Moon.
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.
- 2
Starpoint Gemini 2
Single-player alternative to The Mystery Of The Moon — playable solo, no multiplayer required. Shares Action and Simulation with The Mystery Of The Moon.
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.
- 3
Avorion
Single-player alternative to The Mystery Of The Moon — playable solo, no multiplayer required. Shares Action and Indie with The Mystery Of The Moon.
A procedural co-op space sandbox where players can build their own space ships out of dynamically scalable blocks. Fight epic space battles, explore, mine, trade, wage wars and build your own empire to save your galaxy from being torn apart by an unknown enemy.
- 4
Underspace
Single-player alternative to The Mystery Of The Moon — playable solo, no multiplayer required. Shares Action and Indie with The Mystery Of The Moon.
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.
- 5
Genesis Alpha One Deluxe Edition
Single-player alternative to The Mystery Of The Moon — playable solo, no multiplayer required. Shares Action and Indie with The Mystery Of The Moon.
Hyperjump into the dark recesses of space with Genesis Alpha One - a roguelike FPS where you must build, maintain and navigate your ship through a galaxy filled with hostile alien and human threats. Explore, create and survive the militarized space race in order to secure humanity’s future.
- 6
Starcom: Nexus
Single-player alternative to The Mystery Of The Moon — playable solo, no multiplayer required. Shares Action and Indie with The Mystery Of The Moon.
Suddenly thrown into an unknown galaxy, you must explore, fight or befriend aliens and transform your ship from a small survey vessel into a powerful battlecruiser to unravel the mystery of the forces that brought you here and find your way home.
- 7
Starship EVO
Single-player alternative to The Mystery Of The Moon — playable solo, no multiplayer required. Shares Action and Indie with The Mystery Of The Moon.
Mine and craft your way to orbit, build your own starship and explore a vast, dangerous galaxy alongside your crew. For players who love a meaningful survival progression, a unique and elegant building system, and epic space-opera scale.
- 8
Starcom: Unknown Space
Single-player alternative to The Mystery Of The Moon — playable solo, no multiplayer required. Shares Action and Indie with The Mystery Of The Moon.
Starcom: Unknown Space is an action RPG of space exploration and adventure. Build your own starship while discovering an epic story in a universe of strange mysteries, alien factions and uncharted worlds.