IMHO.

Games like The Sleep Experiment

If The Sleep Experiment is your kind of game, the closest matches are Mountains of Madness, The Coma 3: Bloodlines and Lamentum — picked from the ranked list below. 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 The Sleep Experiment: Experience the horrors of one of the most infamous experiments that ever took place. As a test subject in a top-secret Soviet research facility, you must endure days without sleep while facing unimaginable terrors that lurk in the shadow.

2023ActionIndieSimulation11.99 USDWindows · macOSby ClawsDev
The Sleep Experiment — Steam game cover

Players who liked The Sleep Experiment also play

Steam players who put hours into The Sleep Experiment 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. Mountains of Madness

    WHY THIS

    Top pick for The Sleep Experiment fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with The Sleep Experiment.

    A first person horror exploration game set in the frozen wastes of Antarctica. Use your tools to navigate the frozen galleries untouched by millennia and unearth evidence of a dreadful truth while you search for a madman whose ill fate lies somewhere beneath these Mountains of Madness

    2024ActionIndieAdventure8.99 USDSteam ↗
  2. The Coma 3: Bloodlines

    WHY THIS

    Second-strongest match for The Sleep Experiment fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with The Sleep Experiment.

    Welcome to the world of The Coma 3: Bloodlines. In this realm of shadows rumors and urban legends become reality, and danger lurks around every corner. If a living intruder dies here, their body will be severed from their spirit and never wake again ...

    2026ActionIndieAdventure11.99 USDDeck PlayableSteam ↗
  3. Lamentum

    WHY THIS

    Third-strongest match for The Sleep Experiment fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with The Sleep Experiment.

    Lamentum is a pixel art survival horror game, set in New England in the mid-nineteenth century.

    2021ActionIndieAdventure15.99 USDDeck VerifiedSteam ↗
  4. SOMA

    WHY THIS

    Ranked #4 for The Sleep Experiment fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with The Sleep Experiment.

    From the creators of Amnesia: The Dark Descent comes SOMA, a sci-fi horror game set below the waves of the Atlantic ocean. Struggle to survive a hostile world that will make you question your very existence.

    2015ActionIndieAdventure29.99 USDDeck VerifiedSteam ↗
  5. Dead of Darkness

    WHY THIS

    Ranked #5 for The Sleep Experiment fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with The Sleep Experiment.

    Dead of Darkness is a 2D survival-horror action-adventure. Investigate a mysterious island and unravel its disturbing secret. You’ll have to face grotesque creatures, hurdle deadly traps, solve puzzles, and most importantly, survive.

    2025ActionIndieAdventure15.99 USDDeck VerifiedSteam ↗
  6. The Land of Pain

    WHY THIS

    Ranked #6 for The Sleep Experiment fans by collaborative filtering across millions of Steam libraries. Shares Indie with The Sleep Experiment.

    Something strange appears in the woods. Lost in a dark and unknown place, survive an unrelenting enemy, solve puzzles, and uncover the ancient mystery that’s befallen this land in this Lovecraftian Cosmic Horror adventure.

    2017IndieAdventure11.99 USDDeck VerifiedSteam ↗
  7. Amnesia: The Dark Descent

    WHY THIS

    Ranked #7 for The Sleep Experiment fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with The Sleep Experiment.

    Amnesia: The Dark Descent, a first person survival horror. A game about immersion, discovery and living through a nightmare. An experience that will chill you to the core.

    2010ActionIndieAdventure19.99 USDDeck PlayableSteam ↗
  8. ASYLUM

    WHY THIS

    Ranked #8 for The Sleep Experiment fans by collaborative filtering across millions of Steam libraries. Shares Indie with The Sleep Experiment.

    An epic supernatural horror adventure and the spiritual successor to cult classic Scratches set in a massive, decaying mental institute. Inspired by H. P. Lovecraft, Hammer Films and twisted Euro Horror from the 80s.

    2025IndieAdventure24.99 USDDeck VerifiedSteam ↗

Cheaper alternatives

Games in the same vein priced at least 40% below The Sleep Experiment at current Steam store prices.

  1. Garry's Mod

    WHY THIS

    Priced ~58% under The Sleep Experiment on Steam right now. Shares Indie and Simulation with The Sleep Experiment.

    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 ↗
  2. Vampire Survivors

    WHY THIS

    Priced ~58% under The Sleep Experiment on Steam right now. Shares Action and Indie with The Sleep Experiment.

    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 ↗
  3. R.E.P.O.

    WHY THIS

    Priced ~42% under The Sleep Experiment on Steam right now. Shares Action with The Sleep Experiment.

    An online co-op horror game with up to 6 players. Locate valuable, fully physics-based objects and handle them with care as you retrieve and extract to satisfy your creator's desires.

    2025ActionEarly Access6.99 USDDeck PlayableSteam ↗
  4. Titanfall® 2

    WHY THIS

    Priced ~63% under The Sleep Experiment on Steam right now. Shares Action with The Sleep Experiment.

    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. Slay the Spire

    WHY THIS

    Priced ~48% under The Sleep Experiment on Steam right now. Shares Indie with The Sleep Experiment.

    We fused card games and roguelikes together to make the best single player deckbuilder we could. Craft a unique deck, encounter bizarre creatures, discover relics of immense power, and Slay the Spire!

    2019StrategyIndie6.24 USDDeck VerifiedSteam ↗
  6. Cookie Clicker

    WHY THIS

    Priced ~58% under The Sleep Experiment on Steam right now. Shares Indie and Simulation with The Sleep Experiment.

    An idle game about making cookies! Originally released in 2013 on the web, and actively developed since then. This is the official version for Steam.

    2021StrategyIndieSimulation4.99 USDDeck PlayableSteam ↗
  7. WEBFISHING

    WHY THIS

    Priced ~58% under The Sleep Experiment on Steam right now. Shares Indie with The Sleep Experiment.

    WEBFISHING a multiplayer chatroom-focused fishing game! Relax and fish (on the web!)

    2024IndieMassively MultiplayerCasual4.99 USDSteam ↗
  8. POSTAL 2

    WHY THIS

    Priced ~92% under The Sleep Experiment on Steam right now. Shares Action and Indie with The Sleep Experiment.

    Live a week in the life of "The POSTAL Dude"; a hapless everyman just trying to check off some chores. Buying milk, returning an overdue library book, getting Gary Coleman's autograph, what could possibly go wrong?

    2012ActionIndieAdventure0.99 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 Indie with The Sleep Experiment.

    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 with The Sleep Experiment.

    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. Helltaker

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie with The Sleep Experiment.

    Helltaker is a short game about sharply dressed demon girls.

    2020IndieAdventureFree To PlayFreeDeck PlayableSteam ↗
  4. Ultimate Custom Night

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Indie with The Sleep Experiment.

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

    2018ActionIndieFree To PlayFreeSteam ↗
  5. ENA: Dream BBQ

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie with The Sleep Experiment.

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

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

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie and Simulation with The Sleep Experiment.

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

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

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Indie with The Sleep Experiment.

    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 ↗
  8. STRAFTAT

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with The Sleep Experiment.

    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 ↗

Plays great on Steam Deck

Valve-Verified or Playable picks from the similar pool — ready to go on Deck out of the box.

  1. Lamentum

    WHY THIS

    Deck Verified — runs on Steam Deck out of the box. Shares Action and Indie with The Sleep Experiment.

    Lamentum is a pixel art survival horror game, set in New England in the mid-nineteenth century.

    2021ActionIndieAdventure15.99 USDDeck VerifiedSteam ↗
  2. SOMA

    WHY THIS

    Deck Verified — runs on Steam Deck out of the box. Shares Action and Indie with The Sleep Experiment.

    From the creators of Amnesia: The Dark Descent comes SOMA, a sci-fi horror game set below the waves of the Atlantic ocean. Struggle to survive a hostile world that will make you question your very existence.

    2015ActionIndieAdventure29.99 USDDeck VerifiedSteam ↗
  3. Dead of Darkness

    WHY THIS

    Deck Verified — runs on Steam Deck out of the box. Shares Action and Indie with The Sleep Experiment.

    Dead of Darkness is a 2D survival-horror action-adventure. Investigate a mysterious island and unravel its disturbing secret. You’ll have to face grotesque creatures, hurdle deadly traps, solve puzzles, and most importantly, survive.

    2025ActionIndieAdventure15.99 USDDeck VerifiedSteam ↗
  4. The Land of Pain

    WHY THIS

    Deck Verified — runs on Steam Deck out of the box. Shares Indie with The Sleep Experiment.

    Something strange appears in the woods. Lost in a dark and unknown place, survive an unrelenting enemy, solve puzzles, and uncover the ancient mystery that’s befallen this land in this Lovecraftian Cosmic Horror adventure.

    2017IndieAdventure11.99 USDDeck VerifiedSteam ↗
  5. ASYLUM

    WHY THIS

    Deck Verified — runs on Steam Deck out of the box. Shares Indie with The Sleep Experiment.

    An epic supernatural horror adventure and the spiritual successor to cult classic Scratches set in a massive, decaying mental institute. Inspired by H. P. Lovecraft, Hammer Films and twisted Euro Horror from the 80s.

    2025IndieAdventure24.99 USDDeck VerifiedSteam ↗

Frequently asked about The Sleep Experiment

How much does The Sleep Experiment cost?
The Sleep Experiment is listed on Steam at 11.99 USD (current store price; Steam sales may reduce this temporarily).
What games are most similar to The Sleep Experiment?
Based on Steam play patterns and shared genres/tags, the games most often recommended alongside The Sleep Experiment are Mountains of Madness, The Coma 3: Bloodlines, Lamentum.
Who developed The Sleep Experiment?
The Sleep Experiment was developed by ClawsDev.

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 The Sleep Experiment.

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