Drag the balls to the empty spaces. Every ball can be used only once in a sequence. Once the line is filled, you'll get the Mastermind response. A gray ball stands for a correct color in a wrong position. A black ball stands for a correct color in a correct position.
This free online game was built with HTML5. It runs on Chrome, Firefox, Opera, Safari or Internet Explorer 9 or higher. Play Mastermind unblocked on any device. Mastermind online is optimized for use on PC, Android and iOS devices, including tablets and mobile phones. This game runs directly in your browser - no downloads, no registration, no flash and no plugins are needed to play.