The following is a list of cryptograms from Gravity Falls. There is a cryptogram during the credits of each episode. They use Caesar ciphers, Atbash ciphers, and the A1Z26 cipher. Episodes 1-6 use the Caesar cipher, Episodes 7-13 use Atbash ciphers, Episodes 14-19 use the A1Z26 cipher, and Episode 20 uses a Combined cipher (a combination of all three ciphers). Book 3 contains a Symbol substitution cipher.