Cryptorium: Cipher Archive

Cryptorium is a cryptogram and cipher puzzle anthology. Decode intercepted transmissions, diary fragments, and machine logs using the same tools cryptographers rely on. If you love classic cryptogram puzzles and modern codebreaking, this archive is built for you.

- 12 story packs, 144 handcrafted cryptogram-style puzzles that progress from Caesar and Vigenere to Playfair, Hill, Columnar, Rail Fence, Pigpen, Morse, Binary/Hex/Base, DNA, OTP/XOR, Affine, Polybius, and more.
- Built-in solvers and references for every cryptogram and cipher: frequency analyzer, Vigenere table, Hill/matrix helpers, pigpen visual, signal/binary/hex/dna converters, multi-layer solver, and system-specific keyboards.
- Learn as you play: every puzzle includes a hint and optional helper tools; toggle aids off in Settings for a purist run.
- Track your mastery: stats for total solves, completed packs, hardest clears, favorite systems, and unique systems solved.
- Premium unlock: start with the free "Found Messages I" pack, then open 11 additional archives when you're ready for deeper challenges.
- Play at your pace: no timers, no accounts required. Just you and the ciphers.