Single-player games like Moon Mystery
Below are 12 single-player Steam games similar to Moon Mystery, 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 Moon Mystery page.
Ranked picks
- 1
Moons of Madness
Single-player alternative to Moon Mystery — playable solo, no multiplayer required. Shares Adventure with Moon Mystery.
Moons of Madness is a first-person, story-driven cosmic horror game where the scientific exploration of Mars meets the supernatural dread of Lovecraft.
- 2
Deliver Us The Moon
Single-player alternative to Moon Mystery — playable solo, no multiplayer required. Shares Action and Adventure with Moon Mystery.
The Moon has gone dark, cutting off Earth’s last source of energy. As a lone astronaut, you’ll explore abandoned lunar bases, solve intricate puzzles, and navigate stunning zero-gravity environments. Operate advanced vehicles, uncover hidden truths, and survive in this gripping sci-fi thriller.
- 3
SCP: Fragmented Minds
Single-player alternative to Moon Mystery — playable solo, no multiplayer required. Shares Action with Moon Mystery.
You arrive at Mars Site-113, a decaying monument to the SCP Foundation's ambition—and its failures. Once the most secure facility, now a cradle of horrors calling you to uncover its secrets. Face relentless anomalies, humanity's darkest truths, and a mission that demands survival above all else.
- 4
The Turing Test
Single-player alternative to Moon Mystery — playable solo, no multiplayer required. Shares Adventure with Moon Mystery.
The Turing Test is a challenging first-person puzzle game set on Jupiter’s moon, Europa. You are Ava Turing, an engineer for the International Space Agency (ISA) sent to discover the cause behind the disappearance of the ground crew stationed there.
- 5
Outer Wilds
Single-player alternative to Moon Mystery — playable solo, no multiplayer required. Shares Action and Adventure with Moon Mystery.
Named Game of the Year 2019 by Giant Bomb, Polygon, Eurogamer, and The Guardian, Outer Wilds is a critically-acclaimed and award-winning open world mystery about a solar system trapped in an endless time loop.
- 6
The Invincible
Single-player alternative to Moon Mystery — playable solo, no multiplayer required. Shares Action and Adventure with Moon Mystery.
Rethink human’s dominion in The Invincible: a story-driven adventure set in a hard sci-fi world by Stanisław Lem. Discover planet Regis III as scientist Yasna, use atompunk tools looking for a missing crew and face unforeseen threats. Make choices in a philosophical story that’s driven by science.
- 7
Machinika: Atlas
Single-player alternative to Moon Mystery — playable solo, no multiplayer required. Shares Adventure and Casual with Moon Mystery.
Machinika: Atlas is an indie puzzle game and is the direct sequel to Machinika: Museum, you play as a museum researcher who just land on Atlas. Will you unravel the mysteries of the alien vessel? Solve cryptic puzzles to find out what happened!
- 8
ROUTINE
Single-player alternative to Moon Mystery — playable solo, no multiplayer required. Shares Action and Adventure with Moon Mystery.
ROUTINE is a First Person Sci-Fi Horror set on an abandoned lunar base designed around an 80s vision of the future. Explore and investigate your surroundings as you survive against unknown threats.
- 9
Portal
Single-player alternative to Moon Mystery — playable solo, no multiplayer required. Shares Action with Moon Mystery.
Portal™ is a new single player game from Valve. Set in the mysterious Aperture Science Laboratories, Portal has been called one of the most innovative new games on the horizon and will offer gamers hours of unique gameplay.
- 10
Half-Life
Single-player alternative to Moon Mystery — playable solo, no multiplayer required. Shares Action with Moon Mystery.
Named Game of the Year by over 50 publications, Valve's debut title blends action and adventure with award-winning technology to create a frighteningly realistic world where players must think to survive. Also includes an exciting multiplayer mode that allows you to play against friends and enemies around the world.
- 11
Titanfall® 2
Single-player alternative to Moon Mystery — playable solo, no multiplayer required. Shares Action with Moon Mystery.
Respawn Entertainment gives you the most advanced titan technology in its new, single player campaign & multiplayer experience. Combine & conquer with new titans & pilots, deadlier weapons, & customization and progression systems that help you and your titan flow as one unstoppable killing force.
- 12
Starfield
Single-player alternative to Moon Mystery — playable solo, no multiplayer required.
Starfield is the first new universe in 25 years from Bethesda Game Studios, the award-winning creators of The Elder Scrolls V: Skyrim and Fallout 4.