Single-player games like Primordialis
Below are 13 single-player Steam games similar to Primordialis, 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 Primordialis page.
Ranked picks
- 1
Sipho
Single-player alternative to Primordialis — playable solo, no multiplayer required. Shares Action and Indie with Primordialis.
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.
- 2
Biovoid
Single-player alternative to Primordialis — playable solo, no multiplayer required. Shares Indie and Simulation with Primordialis.
Biovoid is a creature-building roguelike game where you slay hordes of hostile aliens. Combine a variety of cells and mutations to create game-breaking builds and evolve from a fragile hatchling to a deadly predator.
- 3
Flounder
Single-player alternative to Primordialis — playable solo, no multiplayer required. Shares Action and Simulation with Primordialis.
The Ocean Ecosystem Roguelite. Grow a colorful school of fish with unique abilities and unlock powerful items to help them repel boss invasions. Collect rare fish to complete your peaceful Virtual Tank. Hold the line and surface victorious! The depth is deceiving.
- 4
Be
Single-player alternative to Primordialis — playable solo, no multiplayer required. Shares Indie and Simulation with Primordialis.
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.
- 5
Everything is Crab: The Animal Evolution Roguelite
Single-player alternative to Primordialis — playable solo, no multiplayer required. Shares Action and Indie with Primordialis.
The Animal Evolution Roguelite. Hunt, Flee, Scavenge and Thrive in a living ecosystem. Choose from 125+ Evolutions and Specialisations for unique creature combinations in every run. Adapt to survive the natural curve in order to beat carcinisation... or get Darwin'd trying!
- 6
Tower Lab
Single-player alternative to Primordialis — playable solo, no multiplayer required. Shares Indie and Simulation with Primordialis.
Physics-based TD where enemies have no health, push them off instead! Build devastating tower combos that push, pull, and launch enemies. Unlock cards, upgrade towers, discover broken synergies, and dominate through creative strategies.
- 7
VOID/BREAKER
Single-player alternative to Primordialis — playable solo, no multiplayer required. Shares Action and Indie with Primordialis.
Fast paced Bullet hell Roguelite FPS 🔴 Fight relentless machines driven by a hostile AI. Escape an endless cycle. Craft infinite weapon variants with deep gun modding. Forge deadly synergies. Carve your way out through enviro destruction /BREAK THE SYSTEM /BREAK FREE
- 8
FISHERY
Single-player alternative to Primordialis — playable solo, no multiplayer required. Shares Indie and Simulation with Primordialis.
Fishery is a stylized aquarium simulation game. Harness your creativity to build and maintain beautiful aquatic habitats. Then relax and watch your beautiful fish enjoy their home.
- 9
Noita
Single-player alternative to Primordialis — playable solo, no multiplayer required. Shares Action and Indie with Primordialis.
Noita is a magical action roguelite set in a world where every pixel is physically simulated. Fight, explore, melt, burn, freeze and evaporate your way through the procedurally generated world using spells you've created yourself.
- 10
SPORE™
Single-player alternative to Primordialis — playable solo, no multiplayer required. Shares Action and Simulation with Primordialis.
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.
- 11
Kerbal Space Program
Single-player alternative to Primordialis — playable solo, no multiplayer required. Shares Indie and Simulation with Primordialis.
In Kerbal Space Program, take charge of the space program for the alien race known as the Kerbals. You have access to an array of parts to assemble fully-functional spacecraft that flies (or doesn’t) based on realistic aerodynamic and orbital physics.
- 12
Thrive
Single-player alternative to Primordialis — playable solo, no multiplayer required. Shares Indie and Simulation with Primordialis.
An evolution simulation game. Take control of your species in the environment and edit your species as a whole. Compete with other evolving species for resources on an alien planet.
- 13
Croak Crusader: Spawn of the Spore Spectre
Single-player alternative to Primordialis — playable solo, no multiplayer required. Shares Action and Indie with Primordialis.
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"!