IMHO.

Co-op games like Zoo Protocol

Below are 8 cooperative Steam games similar to Zoo Protocol, ranked by player overlap and content similarity. Every pick supports cooperative play — online co-op, LAN co-op, or shared/split-screen — so you can play with friends right out of the box. imho.run pulls from the same Steam category data Valve uses internally, so "Co-op" here matches what the store labels.

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

Ranked picks

  1. 1
    Pigmen's Challenge — Steam game cover

    Pigmen's Challenge

    Online Co-op alternative to Zoo Protocol — playable with friends. Shares Indie and Simulation with Zoo Protocol.

    Pigmen’s Challenge is a 2-player co-op cooking game where one player cooks and the other serves, with roles swapping each day. Keep customers happy, survive the chaos, and see if your teamwork can handle the rising difficulty.

    2026IndieSimulationCasual2.99 USDCo-opSimilar games →
  2. 2
    BUFFET — Steam game cover

    BUFFET

    Online Co-op alternative to Zoo Protocol — playable with friends. Shares Indie and Simulation with Zoo Protocol.

    BUFFET is a chaotic kitchen management game for up to 4 players. Serve delicious (?) dishes and try to survive when customers hate your food and attack back!

    IndieSimulationCo-opSimilar games →
  3. 3
    Border Control Together — Steam game cover

    Border Control Together

    Online Co-op alternative to Zoo Protocol — playable with friends. Shares Indie and Simulation with Zoo Protocol.

    Border Control Together is a first-person border checkpoint simulator for 1-4 players. Check documents, inspect vehicles, uncover contraband, manage your earnings, upgrade the checkpoint, and decide whether to follow the law or profit from corruption.

    IndieSimulationMassively MultiplayerCo-opSimilar games →
  4. 4
    Commie Bobrs — Steam game cover

    Commie Bobrs

    Online Co-op alternative to Zoo Protocol — playable with friends. Shares Adventure and Simulation with Zoo Protocol.

    Commie Bobrs is a chaotic co-op physics-based building simulator. Assemble iconic Eastern Europe buildings block by block using cranes, forklifts, pure muscle power and your friend's questionable guidance. Just try not to die while doing it...

    AdventureSimulationCo-opSimilar games →
  5. 5
    GOP POST — Steam game cover

    GOP POST

    Online Co-op alternative to Zoo Protocol — playable with friends. Shares Indie and Simulation with Zoo Protocol.

    It's 2090. GOPPOST is a co-op Papers Please-style game about defending a MEGA-TOWER. You and your GOP-SQUAD must hold the stairwell check papers, keep the beer flowing, and stop whatever's crawling up from below. Will you survive the shift?

    2027ActionIndieSimulationCo-opSimilar games →
  6. 6
    PAO PAO — Steam game cover

    PAO PAO

    Online Co-op alternative to Zoo Protocol — playable with friends. Shares Indie and Adventure with Zoo Protocol.

    Welcome to PAO PAO, a cozy seaside town where every day is filled with life's little joys. Play solo or with friends in co-op for up to 4 players: cook delicious meals, go fishing, grow crops and create your own cozy home by the sea.

    2026IndieAdventureSimulationCo-opSimilar games →
  7. 7
    ApesCape — Steam game cover

    ApesCape

    Online Co-op alternative to Zoo Protocol — playable with friends. Shares Indie and Adventure with Zoo Protocol.

    In a deep-sea station lost at the bottom of the ocean, the pressure is rising and water is flooding the facility. In this cooperative FPS, every second counts. Work together to find the exit before everything is swallowed by the depths.

    ActionIndieAdventureCo-opSimilar games →
  8. 8
    Rusted Frontier — Steam game cover

    Rusted Frontier

    Online Co-op alternative to Zoo Protocol — playable with friends. Shares Indie and Adventure with Zoo Protocol.

    Haul chaotic cargo, drive fully physically-simulated vehicles, and build ambitious projects across a forgotten frontier. Solo, or co-op chaos with up to 4 players.

    2027ActionIndieAdventureCo-opSimilar games →