Verified unlock loop
- 1
Clear stages
Stage clears award items according to the official description.
- 2
Trade items
Items can be exchanged for invitations; exact costs are not publicly listed on the game page.
- 3
Open a hidden disk
Invitations unlock special disks with different rules and rewards.
- 4
Push past Water Planet
Hidden disks add golden and rainbow bodies and a longer evolution path.
What is not confirmed yet
- The exact invitation recipe for each hidden disk
- The complete hidden evolution chain and English body names
- Reward probabilities or guaranteed drop tables
- The number of clears required for the grand finale
This page will be updated from official devlogs or directly observable game text. It will not fill gaps with invented recipes.
Frequently asked questions
How do you unlock hidden disks in Primordial Sea?
The official page says to clear stages for items, then trade items for invitations that open hidden disks.
What is special about hidden disks?
They have distinct rules and rewards, golden and rainbow bodies, and evolution beyond the Water Planet.
Is there a grand finale?
Yes. The developer lists a grand finale at the end of the hidden-disk progression.