IMHO.

Free games like Space Prison

Below are 8 free-to-play Steam games similar to Space Prison, ranked by player overlap and content similarity. No purchase or Steam login required to view the list. Every pick is a full free-to-play title — not a demo, trial, or time-limited giveaway. imho.run's catalogue refreshes daily, so newly free or newly popular titles surface here without manual editing.

Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Space Prison page.

Ranked picks

  1. 1
    Ultimate Custom Night — Steam game cover

    Ultimate Custom Night

    Free-to-play alternative to Space Prison — no purchase or trial window.

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

    2018ActionIndieFree To PlayFreeFree to playSimilar games →
  2. 2
    Grimm's Hollow — Steam game cover

    Grimm's Hollow

    Free-to-play alternative to Space Prison — no purchase or trial window. Shares Adventure and RPG with Space Prison.

    A spooky, freeware RPG where you search the afterlife for your brother. Reap ghosts with your scythe, explore haunted caves, and eat ghostly treats on your journey through death.

    2019IndieAdventureRPGFreeDeck PlayableFree to playSimilar games →
  3. 3
    Magic Archery — Steam game cover

    Magic Archery

    Free-to-play alternative to Space Prison — no purchase or trial window. Shares Simulation and RPG with Space Prison.

    Train a commoner to become the greatest archer in this short incremental game! Increase your stats, gather wealth from quests, buy upgrades, and infuse your arrows with magic.

    2024IndieSimulationRPGFreeDeck PlayableFree to playSimilar games →
  4. 4
    Control, I'm Not Coming Back — Steam game cover

    Control, I'm Not Coming Back

    Free-to-play alternative to Space Prison — no purchase or trial window. Shares Adventure with Space Prison.

    Control, I'm Not Coming Back is a short and emotional narrative game about a lost astronaut searching for a reason to keep going forward while facing the emptiness of space. Inspired by the Hopecore aesthetic, it’s a story about positivism, friendship and our human connection with Voyager 1.

    2026IndieAdventureFree To PlayFreeDeck VerifiedFree to playSimilar games →
  5. 5
    No Results Found — Steam game cover

    No Results Found

    Free-to-play alternative to Space Prison — no purchase or trial window. Shares Adventure and Simulation with Space Prison.

    Search, dig deeper, and search again. Can you reach the end of the truth?

    2026IndieAdventureSimulationFreeFree to playSimilar games →
  6. 6
    Moonring — Steam game cover

    Moonring

    Free-to-play alternative to Space Prison — no purchase or trial window. Shares RPG with Space Prison.

    A dark-fantasy, turn-based, retro-fusion of classic turn-based RPGs and roguelikes, all presented with a unique neon aesthetic.

    2023RPGFreeDeck VerifiedFree to playSimilar games →
  7. 7
    Aircar — Steam game cover

    Aircar

    Free-to-play alternative to Space Prison — no purchase or trial window.

    A simple immersive flying game built for VR. Pilot an aircar through a futuristic cityscape.

    2019IndieFree To PlayCasualFreeFree to playSimilar games →
  8. 8
    Tukoni: Prologue — Steam game cover

    Tukoni: Prologue

    Free-to-play alternative to Space Prison — no purchase or trial window. Shares Adventure with Space Prison.

    Tukoni: Prologue is a point-and-click puzzle adventure, based on a series of award-winning books by the Ukrainian artist Oksana Bula. Play as Tukoni, the forest spirits, as you meet unique characters, solve captivating puzzles, craft new items, and explore a magical world filled with kindness.

    2020IndieAdventureCasualFreeFree to playSimilar games →