Single-player games like Plankton
Below are 14 single-player Steam games similar to Plankton, 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 Plankton page.
Ranked picks
- 1

Flower Design
Single-player alternative to Plankton — playable solo, no multiplayer required. Shares Indie and Simulation with Plankton.
A flower arrangement sandbox game. The shapes and colors are freely adjustable and there is a garden where you can build a house and put flowers in.
- 2

Tree Bonsai
Single-player alternative to Plankton — playable solo, no multiplayer required. Shares Indie and Simulation with Plankton.
An artistic bonsai tree simulation game that follows the life cycle of a plum tree. You can cut branches, add nutrients, and graft while the seasons pass and your tree grows. You can finally fulfill your dreams of a digital bonsai.
- 3

日记簿
Single-player alternative to Plankton — playable solo, no multiplayer required. Shares Indie and Simulation with Plankton.
一款生活文字模拟类游戏。扮演一名随处可见的大学生,在平凡却又独一无二的文字世界里开启仅属于你的丰富多彩的虚拟大学生活。
- 4

Haste-Miner 2
Single-player alternative to Plankton — playable solo, no multiplayer required. Shares Indie and Simulation with Plankton.
Haste-Miner 2 is a casual game where your main objective is to mine. When mining, you earn a currency called tokens and the blocks you mine are stored in your "backpack". Tokens can be used to upgrade your pickaxe in lots of different ways.
- 5

MAZAICA
Single-player alternative to Plankton — playable solo, no multiplayer required. Shares Indie and Casual with Plankton.
Extend all lines from numbers to fill up the grids. Puzzles are sometimes meditative. Yet often challenging.
- 6

Ant Farm Simulator
Single-player alternative to Plankton — playable solo, no multiplayer required. Shares Indie and Simulation with Plankton.
Ant farm (formicarium) with a colony of ants. Ants have artificial intelligence that mimics the full life cycle, behavior, nature and physics of real insects.
- 7

Shutter Stroll
Single-player alternative to Plankton — playable solo, no multiplayer required. Shares Indie and Simulation with Plankton.
Take a break and relax! No rush – enjoy the journey and soak in the sights. Capture stunning photos across millions of unique islands in this tranquil walking simulator.
- 8

Grind Mindset
Single-player alternative to Plankton — playable solo, no multiplayer required. Shares Indie and Simulation with Plankton.
From zero dollars to a sprawling multi-city empire – that's the goal in Grind Mindset. Start with nothing but ambition and a willingness to click. Rise to monopoly
- 9

Jellyfish
Single-player alternative to Plankton — playable solo, no multiplayer required. Shares Indie and Simulation with Plankton.
A simulation game about the life story of a jellyfish. In this game, I will present the full life cycle of a jellyfish: from an egg to a hydra and finally, after a not very long journey it becomes an adult jellyfish. A work of interactive art to bring the most beautiful of sea creatures to your screen.
- 10

Black Hole Simulator
Single-player alternative to Plankton — playable solo, no multiplayer required. Shares Indie and Simulation with Plankton.
A simple black hole simulator.
- 11

Flower Design Ⅱ
Single-player alternative to Plankton — playable solo, no multiplayer required. Shares Indie and Simulation with Plankton.
An artistic floral arrangement simulation game, a vase of flowers can track your mood at the moment.
- 12

Atom
Single-player alternative to Plankton — playable solo, no multiplayer required. Shares Indie and Simulation with Plankton.
A simple hydrogen atom simulator.
- 13

I Am a Rock
Single-player alternative to Plankton — playable solo, no multiplayer required. Shares Indie and Simulation with Plankton.
A rock's solar system odyssey.
- 14

Yin Yang Space
Single-player alternative to Plankton — playable solo, no multiplayer required. Shares Indie and Simulation with Plankton.
A sandbox FPS game, you can build gardens in the most intuitive and simple way and play with robots.