IMHO.

Single-player games like Protolife: Other Side

Below are 8 single-player Steam games similar to Protolife: Other Side, 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 Protolife: Other Side page.

Ranked picks

  1. 1
    Still Stars Echo — Steam game cover

    Still Stars Echo

    Single-player alternative to Protolife: Other Side — playable solo, no multiplayer required. Shares Indie and Adventure with Protolife: Other Side.

    An atmospheric science-fiction journey across distant alien landscapes. Traverse monolithic structures, solve intricate puzzles, and uncover the story of a lost civilization written among the stars.

    2026IndieAdventureCasualSingle-playerSimilar games →
  2. 2
    StarDrone: Sling Star (with VR mode) — Steam game cover

    StarDrone: Sling Star (with VR mode)

    Single-player alternative to Protolife: Other Side — playable solo, no multiplayer required. Shares Indie and Casual with Protolife: Other Side.

    StarDrone: Sling Star is the Hyper-Kinetic race across the galaxy with a mix of pinball, arcade action, and breakout, now on flat screens and in Virtual Reality.

    2020IndieCasual4.99 USDSingle-playerSimilar games →
  3. 3
    Deadly Maze: Phase 1 — Steam game cover

    Deadly Maze: Phase 1

    Single-player alternative to Protolife: Other Side — playable solo, no multiplayer required. Shares Indie and Adventure with Protolife: Other Side.

    Arcade intuitive game with mazes and puzzles

    2019ActionStrategyIndie5.99 USDSingle-playerSimilar games →
  4. 4
    Star Legion — Steam game cover

    Star Legion

    Single-player alternative to Protolife: Other Side — playable solo, no multiplayer required. Shares Indie and Adventure with Protolife: Other Side.

    Star Legion is a local co-op top-down shooter where you battle rogue machines in intense missions. Craft gear, survive hostile incursions, and reclaim sectors to spread the glory of the intergalactic Roman Empire.

    2025ActionStrategyIndie4.99 USDSingle-playerSimilar games →
  5. 5
    Escape from the Cosmic Abyss — Steam game cover

    Escape from the Cosmic Abyss

    Single-player alternative to Protolife: Other Side — playable solo, no multiplayer required. Shares Indie and Casual with Protolife: Other Side.

    Shoot, Dash and Jetpack for your life to escape the Guardian of the Abyss while taking the Orb of Knowledge with you in this mix of casual and arcade gameplay!

    2020ActionIndieCasual0.99 USDSingle-playerSimilar games →
  6. 6
    Cosmic Cowabunnies — Steam game cover

    Cosmic Cowabunnies

    Single-player alternative to Protolife: Other Side — playable solo, no multiplayer required. Shares Indie and Adventure with Protolife: Other Side.

    Play as "Sauce," the Grey Alien, on a critical mission to hide alien evidence from humanity. Abduct, rescue, mine, and unravel Earth's mysteries. Battle formidable foes and prove your skills on the intergalactic leaderboard. Prevent disclosure, or the truth is out!

    2023ActionIndieAdventure4.99 USDSingle-playerSimilar games →
  7. 7
    Unknown Hero — Steam game cover

    Unknown Hero

    Single-player alternative to Protolife: Other Side — playable solo, no multiplayer required. Shares Indie with Protolife: Other Side.

    Brace yourself for an intense bullet hell experience! Fight your way through challenging levels, defeat bosses, upgrade your weapon and get the highest score!

    2025ActionIndie4.99 USDSingle-playerSimilar games →
  8. 8
    Skippy's Grand Escape — Steam game cover

    Skippy's Grand Escape

    Single-player alternative to Protolife: Other Side — playable solo, no multiplayer required. Shares Indie and Casual with Protolife: Other Side.

    Escape increasingly complex mazes as fast as possible. Optimize your path. Select skills tactically. Watch out for enemies, traps, black holes and more in this space themed top down maze runner.

    2026ActionIndieCasualSingle-playerSimilar games →