IMHO.

Single-player games like Biomass

Below are 12 single-player Steam games similar to Biomass, 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 Biomass page.

Ranked picks

  1. 1
    Resonant Blade — Steam game cover

    Resonant Blade

    Single-player alternative to Biomass — playable solo, no multiplayer required. Shares Action and Indie with Biomass.

    The world is in ruins. The Dark Synths reign. Only the Resonant Blade—a weapon that channels sound into destruction—can turn the tide. Slash, dash, and shatter your enemies in this dystopian sci-fi action adventure.

    2025ActionIndieAdventure19.99 USDSingle-playerSimilar games →
  2. 2
    UNSIGHTED — Steam game cover

    UNSIGHTED

    Single-player alternative to Biomass — playable solo, no multiplayer required. Shares Action and Indie with Biomass.

    EXPLORE YOUR WAY. Awoken to a world ruined by war, Alma must traverse the vast city of Arcadia before the life force of her friends and herself withers away. Time is ticking, and every moment matters. Who will you save, and who will you leave to turn UNSIGHTED?

    2021ActionIndieAdventure19.99 USDDeck VerifiedSingle-playerSimilar games →
  3. 3
    BLADECHIMERA — Steam game cover

    BLADECHIMERA

    Single-player alternative to Biomass — playable solo, no multiplayer required. Shares Action and Indie with Biomass.

    Explore a dark and sinister Osaka as the Demon Hunter Shin. Battle demons, regain lost skills, and uncover the truth of your forgotten past in this exciting occult-inspired cyberpunk metroidvania.

    2025ActionIndie14.99 USDDeck VerifiedSingle-playerSimilar games →
  4. 4
    Death's Gambit: Afterlife — Steam game cover

    Death's Gambit: Afterlife

    Single-player alternative to Biomass — playable solo, no multiplayer required. Shares Action and Indie with Biomass.

    Death's Gambit: Afterlife is a challenging 2D action platformer with deep RPG elements. As an agent of Death bound to his service, unravel the mystery of Siradon and discover the true price of immortality.

    2018ActionIndieAdventure19.99 USDDeck VerifiedSingle-playerSimilar games →
  5. 5
    Dark Devotion — Steam game cover

    Dark Devotion

    Single-player alternative to Biomass — playable solo, no multiplayer required. Shares Action and Indie with Biomass.

    Explore the secrets of a mysterious fallen temple and put your Templar faith to the test in Dark Devotion, where no sacrifice is too great in praise of your God.

    2019ActionIndieAdventure19.99 USDDeck PlayableSingle-playerSimilar games →
  6. 6
    Timespinner — Steam game cover

    Timespinner

    Single-player alternative to Biomass — playable solo, no multiplayer required. Shares Action and Indie with Biomass.

    Travel back in time to change fate itself, in this beautifully crafted story-driven adventure, inspired by classic 90s action-platformers. Join timekeeper Lunais on her quest for revenge against the empire that killed her family, using time-bending powers to explore a vast, connected world.

    2018ActionIndieAdventure19.99 USDDeck VerifiedSingle-playerSimilar games →
  7. 7
    TUNIC — Steam game cover

    TUNIC

    Single-player alternative to Biomass — playable solo, no multiplayer required. Shares Action and RPG with Biomass.

    Explore a land filled with lost legends, ancient powers, and ferocious monsters in TUNIC, an isometric action game about a small fox on a big adventure.

    2022ActionAdventureRPG29.99 USDDeck VerifiedSingle-playerSimilar games →
  8. 8
    Dandara: Trials of Fear Edition — Steam game cover

    Dandara: Trials of Fear Edition

    Single-player alternative to Biomass — playable solo, no multiplayer required. Shares Action and Indie with Biomass.

    In a bizarre universe where the oppressed are on the brink of oblivion, Dandara has awoken to reshape the world.

    2018ActionIndie14.99 USDDeck VerifiedSingle-playerSimilar games →
  9. 9
    DARK SOULS™ II — Steam game cover

    DARK SOULS™ II

    Single-player alternative to Biomass — playable solo, no multiplayer required. Shares Action and RPG with Biomass.

    Developed by FROM SOFTWARE, DARK SOULS™ II is the highly anticipated sequel to the gruelling 2011 breakout hit Dark Souls. The unique old-school action RPG experience captivated imaginations of gamers worldwide with incredible challenge and intense emotional reward.

    2014ActionRPG39.99 USDDeck PlayableSingle-playerSimilar games →
  10. 10
    Hyper Light Drifter — Steam game cover

    Hyper Light Drifter

    Single-player alternative to Biomass — playable solo, no multiplayer required. Shares Action and Indie with Biomass.

    Explore a beautiful, vast and ruined world riddled with dangers and lost technologies.

    2016ActionIndieAdventure5.99 USDDeck VerifiedSingle-playerSimilar games →
  11. 11
    Hollow Knight — Steam game cover

    Hollow Knight

    Single-player alternative to Biomass — playable solo, no multiplayer required. Shares Action and Indie with Biomass.

    Forge your own path in Hollow Knight! An epic action adventure through a vast ruined kingdom of insects and heroes. Explore twisting caverns, battle tainted creatures and befriend bizarre bugs, all in a classic, hand-drawn 2D style.

    2017ActionIndieAdventure14.99 USDDeck VerifiedSingle-playerSimilar games →
  12. 12
    Outer Wilds — Steam game cover

    Outer Wilds

    Single-player alternative to Biomass — playable solo, no multiplayer required. Shares Action with Biomass.

    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.

    2020ActionAdventure24.99 USDDeck VerifiedSingle-playerSimilar games →