Single-player games like Primordialis
Below are 11 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
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!
- 2
Pathogenic
Single-player alternative to Primordialis — playable solo, no multiplayer required. Shares Action and Indie with Primordialis.
You are a disease. Infect the human body as a lone pathogen in this cellular roguelike shooter. Collect organelles to evolve your parasite in a microscopic arms race against your host's immune system. Conquer a beautiful, procedurally generated world of tiny proportions.
- 3
CleanFall
Single-player alternative to Primordialis — playable solo, no multiplayer required. Shares Action and Indie with Primordialis.
CleanFall is a survival rogue-like that prizes player freedom and creativity. Build mobile death machines to fight off ravenous hordes, craft and alchemize gun turrets, and tunnel through subterranean ecosystems crawling with nameless horrors.
- 4
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.
- 5
Moonlighter 2: The Endless Vault
Single-player alternative to Primordialis — playable solo, no multiplayer required. Shares Action with Primordialis.
Experience an action-RPG with roguelike elements where you live the double life of an adventurer and a merchant. Dive into vibrant dimensions to fight enemies, gather loot, and manage your backpack. Rebuild your shop and turn profits into gear for the next adventure!
- 6
Monsters are Coming!
Single-player alternative to Primordialis — playable solo, no multiplayer required. Shares Action and Indie with Primordialis.
Beware, Monsters are Coming! In this Tower-Survivor rogue-lite, you protect an ever-moving city from unrelenting hordes. Gather resources, fortify defences, and survive for as long as you can. Will you reach the Ark?
- 7
Million Depth
Single-player alternative to Primordialis — playable solo, no multiplayer required. Shares Action and Indie with Primordialis.
Craft original weapons and engage in strategic time-freezing battles as you dive into the million-floor deep underground world of this deep-diving action strategy game.
- 8
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.
- 9
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.
- 10
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.
- 11
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.