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

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!
- 2

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.
- 3

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.
- 4

Koral
Single-player alternative to planktOs — playable solo, no multiplayer required. Shares Casual with planktOs.
Koral, a love letter to the ocean. Dive into the beautiful underwater world as a sea current. Solve puzzles to bring back to life coral reefs and spread the beauty of the oceans in different sea ecosystems.
- 5

NAGAISAN
Single-player alternative to planktOs — playable solo, no multiplayer required. Shares Casual with planktOs.
I came to know "her." Since then, I've felt someone's gaze from somewhere. Memories of the place I reached while searching for a lost dog in the past. I'm not sure if it's connected, but I did something. "NAGAISAN" is an adventure game based on urban legends.
- 6

My Koi
Single-player alternative to planktOs — playable solo, no multiplayer required. Shares Casual with planktOs.
My Koi, number 1 hit on the Mac App Store (Games), is a beautiful and relaxing fish pond app. Customise and name each fish. Feed them daily. Watch them grow. Collect new fish. Escape and Relax.
- 7

Under A New Sun
Single-player alternative to planktOs — playable solo, no multiplayer required.
While searching for a new home, an unexpected failure in your ship has left you stranded on a planet surprisingly similar to Earth. Discover a vast open world, hunt for food, develop technologies, and build yourself a new home to survive!
- 8

Eastshade
Single-player alternative to planktOs — playable solo, no multiplayer required.
You are a traveling painter, exploring the island of Eastshade. Capture the world on canvas using your artist’s easel. Talk to the inhabitants to learn about their lives. Make friends and help those in need. Visit cities, scale summits, unearth mysteries, and discover forgotten places!
- 9

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!
- 10

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!
- 11

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.