Climb down into the dungeon, one sudoku at a time.
A sudoku roguelike for people who like to think. A map of ten layers, three lives, a relic of your choice after every board, and no guessing, ever.
Coming to iPhone and iPad. Not on the App Store yet, and there is no release date.
Artwork: Nikkel the gnome guides you through three worlds.
Every board is solvable by reasoning
A wrong digit costs a life, so the game owes you boards where the right digit can always be worked out. It makes each board from a seed and then proves it can be finished by logic alone: it solves the board itself, step by step, using only techniques you can learn. A board that would need a guess is thrown away and made again.
A map you can read
A run is a map of ten layers that you walk from top to bottom. The whole map comes from the run’s seed and is in view before your first step. On most layers you choose your way: an ordinary board, a hard board with fewer clues and a better reward, or an event, and near the bottom there is a place to rest. A boss waits on layer 5 and the final boss on layer 10. There are no coins and no shop; nothing in the dungeon is bought. How a run goes →
Three worlds, three kinds of puzzle
The Cellar
Classic sudoku, from 6×6 up to 9×9. Moss and candlelight.
The Library
Killer sudoku: dotted cages that must add up to the sum in their corner.
The Attic
Thermometers that only rise from bulb to tip, and diagonals that hold every digit.
Finish a world to open the next. All three, with their bosses and relics →
Ten Depths in every world
Each world can be played on ten Depths. Depth 1 is gentle, with four lives and two extra clues on every board. Depth 2 is the game as it is meant. Every Depth after that adds one fixed rule to all the ones before it, and winning a Depth opens the next. Each board earns up to three stars. All ten →
Relics, in the open
After each board you pick one relic from those on offer. There are 58 of them: 16 shared and 14 for each world. They belong to six sets: two relics of a set give a small bonus, three give a large one. Some can be strengthened, and a few carry a price, a strong gain and a real cost, both written on the card. What is on offer comes from the run’s seed and is shown in full before you choose. It is your choice, not a lucky draw, and there is no currency in the game.
Six bosses that bend the rules
Every world has a boss on layer 5 and a final boss on layer 10. Four of them guard squares of the board and keep them shut until the rest is filled in; the two in the Library hide cages until you slip. The rule is written on the board, and the board can still be solved by reasoning alone. Meet them →
A promise you can check
Before your first move the game shows the SHA-256 fingerprint of your run’s secret seed. When the run is over it shows the seed itself, and you can check that it matches, in the game or in any SHA-256 tool. That proves the seed was fixed before you began, and nothing more. How it works →
Made calmly
- No advertisements, no in-app purchases, no account, no internet needed. The game collects nothing.
- Large text, screen reader labels, and a calm mode without movement; vibration only for mistakes and finished boards.
- A portrait layout made for iPad as well as iPhone. English and Dutch.
- Sound effects and music, each with its own switch; nothing is downloaded.
- Six short, optional lessons with Nikkel the gnome. A daily run in every world with a streak of days, an endless mode once you finish one, and your result as text to copy.
Where it stands
Sudoku Dungeon is a playable prototype that has been tested by its maker and by automated checks, not yet by a crowd. It is planned as a single purchase with nothing to buy afterwards. The illustrations were made with an AI image generator and then cut, scaled and checked by hand. The screenshots are real captures of the running game, in English, at the pixel size of an iPhone screen. Nothing here is an award, a review or a player count, because there are none.