The grid becomes evidence.
The case stays fictional.
Cipher is an optional, noir-toned detective block-game route inside Sudoku Cosmos. Five fictional episodes turn completed investigation boards into archive keys, restored evidence, and a locked-room escape-room mood—without replacing classic Sudoku or claiming a real case file.
Five sealed files. One earned route.
Begin with E1. Each complete 36-board case restores its final archive proof and opens the next fictional file. The web pages are a spoiler-safe reading room; the full progression lives inside the Android game.
Notice. Deduce. Restore.
The series asks a player to work through a route of 36 investigation boards in each episode. Solves restore a key; keys restore case evidence; evidence makes the fictional scenario more legible. The standard Sudoku skill remains the engine.
Cipher is deliberately a detective block-game experience with a fictional escape-room tone: cabinet drawers, sealed evidence, and earned episode clearance. It does not claim real police procedure, real crimes, suspect interrogation, co-op play, or a browser escape-room mechanic. Its promise is a concise, authored atmosphere around puzzle-led deduction.
See store status →
One future annual pass. The same story route.
A USD 20 annual Cipher Pass is planned as a future Play Billing product. It is not sold or activated on this website. The core case structure, earned clearance path, and early-access invitation remain separate from any future purchase flow.
