Mastermind is classic logic game, guess the secret code to win, mastermind game is code breaker single player offline easy to play. Mastermind contain four modes: - Mastermind 4 Holes - Mastermind 5 Holes - Mastermind 6 Holes - Mastermind 7 Holes Each mode of mastermind game has its own difficulty: - Easy mode (no duplicate) - Hard mode (Allow duplicate) The game is totally free.