Single-player games like Multicellular
Below are 15 single-player Steam games similar to Multicellular, 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 Multicellular page.
Ranked picks
- 1

SPORE™
Single-player alternative to Multicellular — playable solo, no multiplayer required. Shares Action and Strategy with Multicellular.
Be the architect of your own universe with Spore, an exciting single-player adventure. From Single Cell to Galactic God, evolve your creature in a universe of your own creations.
- 2

Timberborn
Single-player alternative to Multicellular — playable solo, no multiplayer required. Shares Strategy and Indie with Multicellular.
Humans are long gone. In a world struck by droughts and toxic waste, will your lumberpunk beavers do any better? A sandbox city-building game featuring ingenious animals, vertical architecture, water physics, and terraforming. Contains high amounts of wood.
- 3

Imagine Earth
Single-player alternative to Multicellular — playable solo, no multiplayer required. Shares Strategy and Indie with Multicellular.
Build your own global colonies on distant worlds. Manage energy and resource supplies and produce goods for space trade. Form economic and diplomatic alliances or take over competing corporations. Conduct research to protect your colonists from disasters and avoid a climate crisis.
- 4

Planetary Life
Single-player alternative to Multicellular — playable solo, no multiplayer required. Shares Strategy and Indie with Multicellular.
Manipulate climate, add plants and evolve creatures in this planet and life sandbox simulation game. From cells to civilizations, spread life throughout the whole planet. Or just enjoy watching your creation burn!
- 5

Dig or Die
Single-player alternative to Multicellular — playable solo, no multiplayer required. Shares Action and Strategy with Multicellular.
Crash land on a hostile planet where you'll have to build the strongest defenses if you wish to live to escape from it. But be warned... this planet is merciless. Build strong, and smart; else physics may flood or destroy your only hopes of survival.
- 6

Toy Tactics
Single-player alternative to Multicellular — playable solo, no multiplayer required. Shares Action and Strategy with Multicellular.
Become a master strategist in this physics-based Real-Time Tactics game! Command minifig-inspired armies and customize strategies with hand-drawn formations. Conquer unique campaigns for all five armies and unleash massive battles in both single-player and multiplayer modes. Victory awaits!
- 7

Sipho
Single-player alternative to Multicellular — playable solo, no multiplayer required. Shares Action and Strategy with Multicellular.
Sipho is an action survival game with an intricate building system. Grow your own creature and take over the local ecosystem. Fight, grow, survive, dominate. Play in adventure or sandbox mode.
- 8

The Sapling
Single-player alternative to Multicellular — playable solo, no multiplayer required. Shares Simulation with Multicellular.
The Sapling is a short simulation game where you design your own plants and animals, and put them in a world together. Or you turn on random mutations, and see what evolution does to your ecosystem!
- 9

Croak Crusader: Spawn of the Spore Spectre
Single-player alternative to Multicellular — playable solo, no multiplayer required. Shares Action and Indie with Multicellular.
Embark on an odyssey into the unknown! Behold the tale of Toadman, an enigmatic being born from alien tech and the mysteries of Radiant Verde. Witness his perilous quest through treacherous jungles to confront Captain Croak in an epic showdown! Welcome to "Spawn of the Spore Spectre"!
- 10

Home Wars
Single-player alternative to Multicellular — playable solo, no multiplayer required. Shares Action and Strategy with Multicellular.
Do you hate bugs and arachnids? Seeing them creeps you out? Would you like them to disappear off the face of the Earth? GOOD! This is the right game for you! In HW you’ll play as a General of a toy soldiers army, with the sole purpose of saving the owner’s house from the invasion of those damn Bugs.
- 11

Cursor Challenge
Single-player alternative to Multicellular — playable solo, no multiplayer required. Shares Indie and Casual with Multicellular.
Do you want to test your SKILLS and your REFLEXES? If the answer is YES, this is the right game for you! Cursor Challenge! In this game your cursor will face a variety of increasing difficulties ... until the last mode. The IMPOSSIBLE CURSOR CHALLENGE! Legends say neither the developer of the game won that level.
- 12

Bugs!
Single-player alternative to Multicellular — playable solo, no multiplayer required. Shares Strategy and Indie with Multicellular.
Take on the role of an exterminator struggling with a small town invaded by repugnant bugs. Crush them, burn them, poison them, do whatever you have to do to eliminate them!
- 13

Age of Undead
Single-player alternative to Multicellular — playable solo, no multiplayer required. Shares Strategy with Multicellular.
Age of Undead is a multi-genre game (turn-based, RTS, FPS) that allows you to face the frightful Zombie Apocalypse with 3 unique factions: the Army, the Infected, and the Survivors. Make strategic choices in the Campaign, then go into battle and fight to survive!
- 14

Gummy Dummy Battles
Single-player alternative to Multicellular — playable solo, no multiplayer required. Shares Simulation with Multicellular.
Create insane and fun battles fought by totally unconventional warriors! Ragdolls have never been so gummy, dummy, and funny! Place your units and enjoy the battle, or enter the craziest brawl in the gaming world in first person!
- 15

Mercenaries of the Kingdom: First Blood
Single-player alternative to Multicellular — playable solo, no multiplayer required. Shares Indie and Adventure with Multicellular.
Party-based rogue-lite RPG set in Earthial, a fantasy world. Hire various races of mercenaries, equip them, create battle formations, and grab the loot! Kill tens of thousands of enemies using steel and spells!