IMHO.

Games like Moon Mystery

If Moon Mystery is your kind of game, the closest matches are Within the Cosmos, HELIOBIOTIC and Call of Duty®: Infinite Warfare — picked from the ranked list below. Reviewers single out its atmospheric, chill and contemplative. Each pick is ranked by what players of this game also play, shared genres and tags, and review-mined similarity — not a generic popularity list.

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About Moon Mystery: The Moon's haunted - and when an astronaut loses contact with Earth, the adventure begins in full. Fill up your oxygen, load up the guns, and set out on an interstellar FPS adventure across the stars, filled with puzzles, fights, exploration, and strange secrets of the universe.

2024ActionAdventureCasual19.99 USDDeck PlayableWindowsby Cosmoscouts
Moon Mystery — Steam game cover
Players highlight
Chill sci fi adventure without forced actionExploration feels rewarding despite linear structureGorgeous ue4 visuals with varied alien environmentsAtmosphericChillContemplative

Players who liked Moon Mystery also play

Steam players who put hours into Moon Mystery also tend to own these titles — a signal called collaborative filtering. imho.run cross-references millions of library ownership patterns to surface games whose real audiences overlap, regardless of whether their genre tags match.

  1. Within the Cosmos

    WHY THIS

    Shares an atmospheric mood with Moon Mystery.

    Top pick for Moon Mystery fans by collaborative filtering across millions of Steam libraries. Shares Action and Adventure with Moon Mystery.

    Within the Cosmos is a sci-fi RPG. After awakening in a secluded star system, you soon discover a fractured human society grappling with an emerging android threat. Explore planets, uncover mysteries, and navigate differing philosophies. Your choices will shape how the story unfolds.

    2025ActionIndieAdventure9.89 USDSteam ↗
  2. HELIOBIOTIC

    WHY THIS

    Second-strongest match for Moon Mystery fans by collaborative filtering across millions of Steam libraries. Shares Action and Adventure with Moon Mystery.

    Explore the floating islands of a ruined alien world, unearthing the secrets of its lost civilization in a fast-paced time loop.

    ActionAdventureFree To PlayFreeSteam ↗
  3. Call of Duty®: Infinite Warfare

    WHY THIS

    Third-strongest match for Moon Mystery fans by collaborative filtering across millions of Steam libraries. Shares Action and Adventure with Moon Mystery.

    Infinite Warfare delivers three unique game modes: Campaign, Multiplayer, and Zombies.

    2016ActionAdventure59.99 USDDeck PlayableSteam ↗
  4. Alien Life Lab

    WHY THIS

    Ranked #4 for Moon Mystery fans by collaborative filtering across millions of Steam libraries. Shares Action and Adventure with Moon Mystery.

    Giedi Satellite takes a job as a wildlife handler on a colossal nature preserve space station that goes awry in comedic and horrific fashion. Become an Alien Wildlife Control Specialist in this horromedy adventure.

    2022ActionIndieAdventure4.99 USDSteam ↗
  5. Humanity Lost

    WHY THIS

    Shares an atmospheric mood with Moon Mystery.

    Ranked #5 for Moon Mystery fans by collaborative filtering across millions of Steam libraries. Shares Action and Adventure with Moon Mystery.

    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.

    2021ActionAdventureRPG3.99 USDSteam ↗
  6. Atomic Heart

    WHY THIS

    Shares an atmospheric mood with Moon Mystery.

    Ranked #6 for Moon Mystery fans by collaborative filtering across millions of Steam libraries. Shares Action and Adventure with Moon Mystery.

    In a mad and sublime utopian world, take part in explosive encounters. Adapt your fighting style to each opponent, use your environment and upgrade your equipment to fulfill your mission. If you want to reach the truth, you'll have to pay in blood.

    2023ActionAdventureRPG59.99 USDDeck VerifiedSteam ↗
  7. Moons of Madness

    WHY THIS

    Shares an atmospheric mood with Moon Mystery.

    Ranked #7 for Moon Mystery fans by collaborative filtering across millions of Steam libraries. 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.

    2019Adventure24.99 USDDeck VerifiedSteam ↗
  8. Syndrome

    WHY THIS

    Shares an atmospheric mood with Moon Mystery.

    Ranked #8 for Moon Mystery fans by collaborative filtering across millions of Steam libraries. Shares Action and Adventure with Moon Mystery.

    Syndrome, a sci-fi survival horror game that places you in a living hell inside a doomed starship. Find out what happened to your lost crew. Run. Hide. Fight. Survive.

    2016ActionAdventure19.99 USDSteam ↗

Reviewers mention these as similar to Moon Mystery

Surfaced from review text: when other players write 'if you liked X, try Y', we catch the name and resolve it back to a Steam game.

  1. Portal

    WHY THIS

    Shares an unsettling mood with Moon Mystery.

    Reviewers of Moon Mystery cross-mention this title as a similar play. 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.

    2007Action9.99 USDDeck VerifiedSteam ↗
  2. Half-Life

    WHY THIS

    Shares an atmospheric mood with Moon Mystery.

    Reviewers of Moon Mystery cross-mention this title as a similar play. 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.

    1998Action9.99 USDDeck VerifiedSteam ↗
  3. Deliver Us The Moon

    WHY THIS

    Shares an atmospheric mood with Moon Mystery.

    Reviewers of Moon Mystery cross-mention this title as a similar play. 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.

    2019ActionIndieAdventure24.99 USDDeck VerifiedSteam ↗
  4. Titanfall® 2

    WHY THIS

    Reviewers of Moon Mystery cross-mention this title as a similar play. 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.

    2020Action4.49 USDDeck PlayableSteam ↗
  5. Starfield

    WHY THIS

    Shares an atmospheric mood with Moon Mystery.

    Reviewers of Moon Mystery cross-mention this title as a similar play.

    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.

    2023RPG49.99 USDSteam ↗
  6. Red Matter 2

    WHY THIS

    Shares an atmospheric mood with Moon Mystery.

    Reviewers of Moon Mystery cross-mention this title as a similar play. Shares Action and Adventure with Moon Mystery.

    Red Matter 2 is an immersive, puzzle-adventure game that will transport you to the far reaches of space. Step into the shoes of Sasha, an agent awakened in a lunar base by an undercover operative and tasked with uncovering the secrets of the mysterious Red Matter.

    2022ActionIndieAdventure29.99 USDSteam ↗

Cheaper alternatives

Games in the same vein priced at least 40% below Moon Mystery at current Steam store prices.

  1. Terraria

    WHY THIS

    Priced ~50% under Moon Mystery on Steam right now. Shares Action and Adventure with Moon Mystery.

    Dig, fight, explore, build! Nothing is impossible in this action-packed adventure game. Four Pack also available!

    2011ActionIndieAdventure9.99 USDDeck VerifiedSteam ↗
  2. Garry's Mod

    WHY THIS

    Priced ~75% under Moon Mystery on Steam right now. Shares Casual with Moon Mystery.

    Garry's Mod is a physics sandbox. There aren't any predefined aims or goals. We give you the tools and leave you to play.

    2006IndieSimulationCasual4.99 USDDeck PlayableSteam ↗
  3. Lethal Company

    WHY THIS

    Priced ~50% under Moon Mystery on Steam right now. Shares Action and Adventure with Moon Mystery.

    A co-op horror about scavenging at abandoned moons to sell scrap to the Company.

    2023ActionIndieAdventure9.99 USDDeck PlayableSteam ↗
  4. Left 4 Dead 2

    WHY THIS

    Priced ~50% under Moon Mystery on Steam right now. Shares Action with Moon Mystery.

    Set in the zombie apocalypse, Left 4 Dead 2 is a co-operative action horror FPS takes you and your friends through the cities, swamps and cemeteries of the Deep South, from Savannah to New Orleans across five expansive campaigns.

    2009Action9.99 USDDeck VerifiedSteam ↗
  5. People Playground

    WHY THIS

    Priced ~50% under Moon Mystery on Steam right now. Shares Action and Casual with Moon Mystery.

    Shoot, stab, burn, poison, tear, vaporise, or crush ragdolls in a large open space.

    2019ActionIndieSimulation9.99 USDDeck PlayableSteam ↗
  6. Portal 2

    WHY THIS

    Priced ~50% under Moon Mystery on Steam right now. Shares Action and Adventure with Moon Mystery.

    The "Perpetual Testing Initiative" has been expanded to allow you to design co-op puzzles for you and your friends!

    2011ActionAdventure9.99 USDDeck VerifiedSteam ↗
  7. Fallout: New Vegas

    WHY THIS

    Shares an atmospheric mood with Moon Mystery.

    Priced ~50% under Moon Mystery on Steam right now. Shares Action with Moon Mystery.

    Welcome to Vegas. New Vegas. Enjoy your stay!

    2010ActionRPG9.99 USDDeck PlayableSteam ↗
  8. Vampire Survivors

    WHY THIS

    Priced ~75% under Moon Mystery on Steam right now. Shares Action and Casual with Moon Mystery.

    Mow down thousands of night creatures and survive until dawn! Vampire Survivors is a gothic horror casual game with rogue-lite elements, where your choices can allow you to quickly snowball against the hundreds of monsters that get thrown at you. Be the bullet hell!

    2022ActionIndieRPG4.99 USDDeck VerifiedSteam ↗

Free alternatives

Free-to-play games that recommended players of this title also tend to enjoy.

  1. Doki Doki Literature Club!

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Casual with Moon Mystery.

    The Literature Club is full of cute girls! Will you write the way into their heart? This game is not suitable for children or those who are easily disturbed.

    2017IndieFree To PlayCasualFreeDeck PlayableSteam ↗
  2. Life is Strange - Episode 1

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Adventure with Moon Mystery.

    Episode 1 now FREE! Life is Strange is an award-winning and critically acclaimed episodic adventure game that allows the player to rewind time and affect the past, present and future.

    2015ActionAdventureFreeDeck PlayableSteam ↗
  3. Ultimate Custom Night

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with Moon Mystery.

    Welcome to the ultimate FNAF mashup, featuring 50 selectable characters and custom difficulties!

    2018ActionIndieFree To PlayFreeSteam ↗
  4. ENA: Dream BBQ

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Adventure with Moon Mystery.

    Experience surreal environments and inexplicable characters as ENA in a new wild world.

    2025IndieAdventureFreeDeck VerifiedSteam ↗
  5. The Murder of Sonic the Hedgehog

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Casual with Moon Mystery.

    Sonic the Hedgehog...was murdered!? Get to the bottom of the mystery in this brand-new adventure!

    2023IndieSimulationFree To PlayFreeDeck PlayableSteam ↗
  6. Indigo Park: Chapter 1

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Adventure with Moon Mystery.

    Explore the abandoned childhood wonder of Indigo Park! Guided by Rambley the Raccoon, help restore power to the destroyed amusement park while you run from the reason it shut down.

    2024ActionIndieAdventureFreeDeck PlayableSteam ↗
  7. STRAFTAT

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with Moon Mystery.

    STRAFTAT is a 1v1/2v2 ONLINE first person SHOOTER with quick rounds in over 350 MAPS ; Including all WEAPONS, proximity chat and 4 players FFA.

    2024ActionFreeDeck PlayableSteam ↗
  8. The Looker

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it.

    You wake up, alone, on a strangely familiar island full of puzzles that will frustrate and annoy you.

    2022IndieFreeDeck PlayableSteam ↗

Frequently asked about Moon Mystery

Does Moon Mystery run on Steam Deck?
Moon Mystery is rated Playable on Steam Deck — it runs, but expect some manual adjustments (control remapping, text size, or graphics settings) for the best experience.
How much does Moon Mystery cost?
Moon Mystery is listed on Steam at 19.99 USD (current store price; Steam sales may reduce this temporarily).
What games are most similar to Moon Mystery?
Based on Steam play patterns and shared genres/tags, the games most often recommended alongside Moon Mystery are Within the Cosmos, HELIOBIOTIC, Call of Duty®: Infinite Warfare.
Who developed Moon Mystery?
Moon Mystery was developed by Cosmoscouts and published by indie.io.

imho.run ranks Steam game alternatives using a mix of collaborative filtering (ALS / iALS / EASE / LightGCN), content scoring over genres, categories, Steam tags, developers, and publishers, plus AI-extracted vibes mined from review text. The page above is generated in seed mode anchored on Moon Mystery.

For library-aware picks tuned to your specific taste, sign in with Steam on the home page.

30 Games Like Moon Mystery — Ranked for 2026 · imho.run