What difficulties does Ocean Explorer include?

Choose Very Easy, Easy, Medium, Hard, or Hardest. Each level uses its own clue and difficulty profile.

Do I need an account for Ocean Explorer?

No. The game works without an account and saves the current puzzle locally on this device.

Explorer

Jigsaw Sudoku

Place 1–6 once in each row, column, and irregular reef region.

Puzzle setup

Select a difficulty to prepare your Ocean Explorer adventure.

How this world works

Navigate irregular reef regions. Place 1–6 once in each row, column, and irregular reef region.