PET Mastermind (also called PET Crypto) is an implementation of the classic game mastermind. The computer will think of a code of characters and the player must try to find out the code by guessing. After each guess the computer will signal how many of the selected symbols were in the correct position and how many are present but in a different position. There's a limited number of guesses the player can make. The game features four difficulty levels which vary the length of the code and the number of symbols.