IMHO.

Single-player games like Peacequarium

Below are 14 single-player Steam games similar to Peacequarium, 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 Peacequarium page.

Ranked picks

  1. 1
    Soggy Beans — Steam game cover

    Soggy Beans

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

    Fish will come, fish will go. Take photos, collect beans, decorate your seascape, then relax or do other things while your friends swim by in this calming side-idler.

    2026IndieSimulationCasualSingle-playerSimilar games →
  2. 2
    Lepidarium — Steam game cover

    Lepidarium

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

    Relax and collect hundreds of unique butterflies and moths in this cozy idle game. Watch caterpillars transform from larva to chrysalis to winged beauty, customize lush greenhouses, and discover rare species from monarchs to atlas moths.

    2026IndieSimulationCasual6.39 USDSingle-playerSimilar games →
  3. 3
    Dinosaurium — Steam game cover

    Dinosaurium

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

    Relax and collect over 500 unique dinosaurs in this cozy idle game. Watch hatchlings grow into towering giants in real-time, customize prehistoric habitats across 9 themed packs, and discover rare species from tiny raptors to mighty sauropods.

    2026IndieSimulationCasualSingle-playerSimilar games →
  4. 4
    Amphibarium — Steam game cover

    Amphibarium

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

    Relax and collect hundreds of unique frogs and salamanders in this cozy idle game. Watch tadpoles undergo metamorphosis in real-time, customize lush terrariums, and discover rare species. Let your vivarium thrive in the background while you work or study. Start your collection today!

    2026IndieSimulationCasual7.99 USDSingle-playerSimilar games →
  5. 5
    Aviarium — Steam game cover

    Aviarium

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

    Aviarium is a relaxing sky sanctuary simulation filled with cute birds. Manage your floating aviary with click and idle mechanics, collect resources, and enjoy a pleasant experience in a colorful and peaceful world above the clouds.

    2026IndieSimulationCasual7.99 USDDeck PlayableSingle-playerSimilar games →
  6. 6
    Cozy Littlequarium — Steam game cover

    Cozy Littlequarium

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

    Cozy Littlequarium is a relaxing aquarium simulator that sits at the bottom of your screen! Take care, breed them, collect and decorate!

    2025IndieSimulationCasual5.24 USDSingle-playerSimilar games →
  7. 7
    Fish Companions — Steam game cover

    Fish Companions

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

    Fish Companions is a relaxing idle game that brings colorful life to your desktop. Adopt your own digital fish to keep you company. Raise your companions, unlock aquariums, explore new oceans filled with more fish, and collect them all! Hang out with your friends to enjoy even more companionship!

    2026IndieSimulationCasual3.99 USDSingle-playerSimilar games →
  8. 8
    Chillquarium — Steam game cover

    Chillquarium

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

    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 →
  9. 9
    Choo Choo Survivor — Steam game cover

    Choo Choo Survivor

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

    Drive your train to safety while shooting down endless hordes of zombies blocking your way. Upgrade your weapons and abilities and become absurdly powerful!

    2023ActionIndieSimulation4.99 USDDeck PlayableSingle-playerSimilar games →
  10. 10
    Gamer To Game Developer Series 1: More Than a Gamer — Steam game cover

    Gamer To Game Developer Series 1: More Than a Gamer

    Single-player alternative to Peacequarium — playable solo, no multiplayer required.

    Welcome to the new GTGD S1, a Unity 2017 multiplayer tutorial for game developers. This training course is of intermediate difficulty so you should first be familiar with the basics of coding in Unity. This tutorial will teach you the key elements of the Unity 2017 multiplayer system.

    2014EducationSoftware Training24.99 USDSingle-playerSimilar games →
  11. 11
    Guild Commander — Steam game cover

    Guild Commander

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

    In Guild Commander you manage your guild to victory! Deploy your guild members and save your world from the Necro Lord!

    2015StrategyIndieSimulation9.99 USDSingle-playerSimilar games →
  12. 12
    Weekend Drive — Steam game cover

    Weekend Drive

    Single-player alternative to Peacequarium — playable solo, no multiplayer required.

    Giants, zombies, aliens, dinosaurs, a fully destructible city with fun vehicles (including helicopter!) and weapons at your disposable, yes Weekend Drive is way ahead of the curve! Get set for a fun unique full on action first person shooter experience!

    2019ActionIndieEarly Access4.99 USDSingle-playerSimilar games →
  13. 13
    Model City — Steam game cover

    Model City

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

    Welcome to Model City, a calm relaxing small game where you can't lose or do anything wrong.

    2020IndieSimulationCasual4.99 USDSingle-playerSimilar games →
  14. 14
    Home By The River — Steam game cover

    Home By The River

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

    This is a resource gathering, crafting RPG, where you build your home from scratch and make whatever design you want. You start with a dead polluted land that you transform into a beautiful homestead by a river. Play single player or LAN Co-op.

    2023IndieAdventureSimulation9.99 USDDeck PlayableSingle-playerSimilar games →