Sudoku Adventure
A guided journey through variant sudoku: twelve illustrated worlds and 66 levels, from a first 4×4 to rules that bend the whole board. Three routes, take them in any order. Start free — no account needed.
The twelve worlds
- Sprout Garden — Tiny grids to learn the ropes. 5 levels.
- Thermo Springs — Digits climb along thermometers. 6 levels.
- Stepwater Lagoon — Lines ruled by the size of the step. 5 levels.
- Mirror Cove — Lines that answer to their own ends. 6 levels.
- Spectrum Ridge — Lines cut into equal chunks. 5 levels.
- Cage Canyon — Regions drawn where you did not expect them. 6 levels.
- Shifting Wards — The regions themselves move. 5 levels.
- Wallmark Peaks — Marks on the walls between cells. 6 levels.
- The Casting Floor — Each cell judged against its neighbours. 5 levels.
- Horizon Flats — Clues that stand outside the grid. 5 levels.
- Knight's Reach — Rules with nothing drawn on the board. 6 levels.
- Master's Castle — Everything you have learned, at full strength. 6 levels.
Three stars on every level is the real challenge: finish a level to earn a star, keep it clean — one goes for using a hint, one for a wrong digit. 198 stars are on the table.