IMHO.

Single-player games like GLOOPALAXY

Below are 8 single-player Steam games similar to GLOOPALAXY, 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 GLOOPALAXY page.

Ranked picks

  1. 1
    Tiny Glass Tank: Dwarf Shrimp and Friends — Steam game cover

    Tiny Glass Tank: Dwarf Shrimp and Friends

    Single-player alternative to GLOOPALAXY — playable solo, no multiplayer required. Shares Simulation with GLOOPALAXY.

    A cozy pixel-art tank game about tiny critters, active care, collecting, trading, and decorating. Feed little friends, keep water steady, raise hearts for better value, grow your collection, shape each tank your way, and slowly build little living glass worlds. *This is not an idle coin game.*

    2026Simulation12.99 USDSingle-playerSimilar games →
  2. 2
    Orion Blue — Steam game cover

    Orion Blue

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

    Orion Blue is a cozy fishing adventure set on a beautiful alien planet. Catch fish, gather resources, and build relationships with the locals. Play actively, or relax and let the game progress with Idle Mode.

    2026SportsIndieAdventureSingle-playerSimilar games →
  3. 3
    Fishing Echoes — Steam game cover

    Fishing Echoes

    Single-player alternative to GLOOPALAXY — playable solo, no multiplayer required. Shares Simulation with GLOOPALAXY.

    Fishing Echoes is a fantasy fishing game where you catch elemental fish to save the realm from a world-devouring maelstrom.

    2026AdventureSimulationRPGSingle-playerSimilar games →
  4. 4
    Megaquarium — Steam game cover

    Megaquarium

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

    The public aquarium simulator. Design your displays, look after your fish, manage your staff and keep your guests happy! It's all in a day's work as the curator of your very own Megaquarium.

    2018StrategyIndieSimulation24.99 USDDeck PlayableSingle-playerSimilar games →
  5. 5
    Idlequarium — Steam game cover

    Idlequarium

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

    Idlequarium is a casual simulation game where you raise adorable little fish to earn coins, purchase decorations, and build a fully customized aquarium.The game sits anywhere on your desktop, letting you interact with your live aquarium during work or study breaks.

    2025IndieSimulationCasual1.79 USDSingle-playerSimilar games →
  6. 6
    Tiny Aquarium: Social Fishkeeping — Steam game cover

    Tiny Aquarium: Social Fishkeeping

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

    A happy aquarium that lives at the bottom of your screen! Tiny Aquarium is a social idle simulator that keeps growing, even when offline. Hatch, sell fish, decorate, go fishin’, and visit your friends’ aquariums with bite-sized daily sessions.

    2025IndieSimulationMassively Multiplayer7.49 USDDeck PlayableSingle-playerSimilar games →
  7. 7
    Ecosystem — Steam game cover

    Ecosystem

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

    Create virtual lifeforms whose development is shaped by a deep simulation of evolution. Guide them as they fight, mate, and adapt to the environment you have built. All the creatures in the trailer evolved on their own in the game!

    2024StrategyIndieSimulation19.99 USDDeck PlayableSingle-playerSimilar games →
  8. 8
    Chillquarium — Steam game cover

    Chillquarium

    Single-player alternative to GLOOPALAXY — playable solo, no multiplayer required. Shares Simulation with GLOOPALAXY.

    Chillquarium is a cozy and relaxing idle game. Buy fish and raise them in real time, then sell them to turn a profit! Customize your aquarium as you progress from a simple starter tank to your dream setup by filling your collection with rare exotic fish and ultra-rare color variants!

    2023SimulationCasual5.99 USDDeck PlayableSingle-playerSimilar games →