Primordialis

Primordialis

Early access since Jul 2025

Primordialis is a physics-based roguelike fish builder. Unleash your creativity to defeat creatures using venomous tentacles, electrical shocks, or exploding children. The possibilities are endless. Explore the primordial depths to reveal its secrets and discover what lies beyond.

93% positive · 1,024 reviews
Not yet
In early access, content still planned
High confidence
Content Planned
Not yet
In early access, content still planned
High confidence
Content Planned

Where to buy

Steam $19.99
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Evaluation

Primordialis is a solo-developed game currently in Steam Early Access, where it has been since launching on July 2, 2025. The developer has maintained consistent, active development throughout the game's history. Two major content milestones have shipped since Early Access launch: v0.1 on December 24, 2025 (adding 10 new cell types, new mutations, a reworked boss, and extensive gameplay changes) and v0.2 beta on June 15, 2026 (featuring a complete map generation rewrite, 2 new side biomes, 5 new cell types, and significant system improvements). A public beta branch has been open since July 2025 to preview upcoming changes before they arrive on the main branch. On July 6, 2026, the developer published an Early Access roadmap outlining their plans for continued development, explicitly noting goals to add more biomes and flesh out the world. In the June 2026 update post, the developer also stated directly: "I have much more I want to add to the game and I will continue working on it until it is complete." These are clear commitments to future content. The developer's most recent communication was the roadmap post on July 6, 2026 — just six weeks before this assessment. There are no signs of development slowing or stopping.
Evidence
Developer published an Early Access roadmap outlining planned development, including additional biomes and further content additions.
news post · Jul 6, 2026 source content planned
high
Developer states: 'I have much more I want to add to the game and I will continue working on it until it is complete.' v0.2 beta shipped with a full map generation rewrite, 2 new side biomes, 5 new cell types, and performance improvements.
news post · Jun 15, 2026 source content planned
high

Media

Details

Publisher
Kyler Natividad
Achievements
5
Platform
Windows
Controller
—
Steam Deck
Playable
Players
Single-player

About this game

Primordialis is a physics-based roguelike fish builder. Unleash your creativity to defeat creatures using venomous tentacles, electrical shocks, or exploding children. The possibilities are endless. Explore the primordial depths to reveal its secrets and discover what lies beyond.

================================= Create ==================================

The core of Primordialis is its simple yet deep creature creation system. Your body is constructed out of cells which each have unique properties and functions. With over 60 cell types to place and combine, there are countless creative combinations you can use to engineer your perfect fish.
You are given the freedom to play how you want, whether you want to be a massive serpent that swallows other creatures whole or to tinker with complex mechanisms and circuitry. Your only limit is your imagination.

================================= Survive =================================

In the main rogue-like mode, you embark on a difficult journey of growth and evolution. Explore the world and learn to deal with a diverse ecosystem of hand-crafted enemies, all built using the same creature creation system as you. Discover cell types, mutations and more to help you survive in this harsh and brutal world. Traverse the 5 main biomes and discover what lies at the end.

You can also play in sandbox mode if you want to perfect your creature design plans before a run, study the biology of your enemies, or just enjoy some relaxed creature building.

Last evaluated Aug 17, 2026
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