IMHO.

Single-player games like planktOs

Below are 11 single-player Steam games similar to planktOs, 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 planktOs page.

Ranked picks

  1. 1
    Floraison — Steam game cover

    Floraison

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

    Floraison is a cozy narrative game based on the language of flowers. Explore Heimat, meet its curious inhabitants, gather rare plants, and craft emotionally powerful bouquets to help them, shape the story, and convey the message of your choice.

    2027IndieAdventureCasualSingle-playerSimilar games →
  2. 2
    Spear Dive — Steam game cover

    Spear Dive

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

    Take up your spear in a first-person freediving spearfishing simulator. Study fish behavior, manage oxygen and body temperature, upgrade your gear, and explore seas shaped by seasons, temperature, turbidity, and waves as you fill your encyclopedia and unlock new fishing grounds.

    SportsIndieSimulationSingle-playerSimilar games →
  3. 3
    Water Droplet Simulator — Steam game cover

    Water Droplet Simulator

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

    You are a water droplet. You can look around. That's it.

    2026IndieAdventureSimulationSingle-playerSimilar games →
  4. 4
    Mesoké — Steam game cover

    Mesoké

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

    Mesoké is a poetic and introspective flying game. Glide freely through an ever-shifting inner world, where every movement brushes against memory, emotion, and beauty. Explore, take risks, and collect the vital energy that brings your inner sanctuary back to life.

    2026IndieAdventureCasual13.49 USDDeck PlayableSingle-playerSimilar games →
  5. 5
    Be — Steam game cover

    Be

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

    Build, relax or explore in a beautiful world. Chill out next to a lake or build crazy structures (with friends!) Choose your own weather & time of day.

    2022IndieSimulationCasual12.99 USDSingle-playerSimilar games →
  6. 6
    Smoking Simulator — Steam game cover

    Smoking Simulator

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

    Have you ever wanted to relax and have a good smoke in an atmospheric village? Then you are exactly at the right place - take a drag on your cigarette and go ahead and explore our wonderful world.

    2023IndieSimulationCasual0.99 USDSingle-playerSimilar games →
  7. 7
    Dolphin Spirit: Ocean Mission — Steam game cover

    Dolphin Spirit: Ocean Mission

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

    Explore the island of Maupiroa and discover its deep-sea secrets!

    2023AdventureSimulation24.99 USDDeck VerifiedSingle-playerSimilar games →
  8. 8
    Tree Simulator 2023 — Steam game cover

    Tree Simulator 2023

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

    It's exactly what it sounds like! Have you ever wanted to be a tree? Do you like odd numbers? How about multiplayer, weather, seasons and more!? Well then this is the game for you! Come on down to a place where you will never want to leaf. Relax and be the best tree you can be. 1-250 players.

    2022ActionIndieAdventure7.99 USDDeck VerifiedSingle-playerSimilar games →
  9. 9
    Bloxiq VR — Steam game cover

    Bloxiq VR

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

    Manipulate blocks in 3D to connect four or more of the same color above, below, beside or even through. Conquer obstacles such as bombs, locks and hidden blocks in devilishly clever and addicting challenges. Bloxiq VR is the perfect combination of beauty and challenge. Prepare to be stumped!

    2016StrategyIndieCasual14.99 USDSingle-playerSimilar games →
  10. 10
    Oh No! Ninjas! — Steam game cover

    Oh No! Ninjas!

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

    Oh no! Ninjas are attacking! Type words to defeat them!

    2018IndieCasual1.99 USDSingle-playerSimilar games →
  11. 11
    VocaBRAWLary — Steam game cover

    VocaBRAWLary

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

    Welcome to VocaBRAWLary, a fast and fun multiplayer typing game. Compete against your friends to become a Word Master.

    2023IndieCasual1.99 USDSingle-playerSimilar games →