Cipher Desk 2

Take your seat at Cipher Desk II,

 a lo-fi cryptanalysis game about breaking substitution ciphers under increasingly hostile rules.

 Use frequency analysis, 

pattern matching, 

repeated-sequence scans,

 crib testing,

 symbol inspection,

 and your own notes to solve everything from clean beginner files to nearly impossible intercepts with missing spaces, reversed words, null symbols, split keys, numbers, and punctuation. Every solved case enters your permanent offline record and shapes your Player ELO—provided you can resist reaching for a computed letter.