Safe Cracker

Reminiscent of the old "Mastermind" game - can you unlock the safe? Use logic to decipher the code either in a quick game or unlock as many as you can in the timed mode.
Try to unlock as many as you can or unlock a safe as quickly as you can or in as few moves as possible to make it to the global highscores.
Unlock all 20 achievements to prove you are a true master of logic!