Unofficial browser game companion
Primordial
Sea
Build a world from Cosmic Dust. Plan the ten-stage merge chain, protect your largest planet, and enter the hidden disks without guessing at unpublished data.
Verified normal disk
From dust to a living water planet
- 1Cosmic DustStart
- 2Pebble2 x Dust
- 3Rock2 x Pebble
- 4Planetesimal2 x Rock
- 5Molten Core2 x Planetesimal
- 6Magma Sphere2 x Molten Core
- 7Cooled World2 x Magma Sphere
- 8Rain World2 x Cooled World
- 9Ocean World2 x Rain World
- 10Water Planet2 x Ocean World
Loading merge planner...
Actual game state
See the gravity disk before you play
Quick orientation
The rules that shape every run
These points come from the official release page. Strategy pages build on them, and clearly label any practical inference.
What is Primordial Sea?
Primordial Sea is a free HTML5 cosmic merge puzzle by float-u-space. Players drop matching planetesimals into a gravity disk and evolve them from Cosmic Dust to a Water Planet.
Can I play Primordial Sea in a browser?
Yes. The official itch.io release supports browser play on mobile and desktop with no installation.
What is the full Primordial Sea evolution chain?
The verified normal chain is Cosmic Dust, Pebble, Rock, Planetesimal, Molten Core, Magma Sphere, Cooled World, Rain World, Ocean World, and Water Planet.
How do hidden disks work?
Stage clears earn items that can be traded for invitations. Invitations open special disks with distinct rules, golden and rainbow bodies, and evolution beyond the Water Planet.
What happens when the fuse expires?
The held body explodes and the blast can scatter the bodies already stacked on the disk. The fuse becomes shorter as score rises.
Does Primordial Sea have enemy mode?
Yes. Optional enemy mode has three strengths. Dark stars target the largest planet and must be tapped before they detonate it.