Mastermind Bulls Cows, also known as Codebreaker, is a challenging puzzle game available for Android. The objective of the game is to guess the secret code, which is a sequence of colored chips. Depending on the settings, the secret code can have 4, 5, or 6 chips, and they can be repeated with certain limitations.

At each turn, the player has to guess the color and sequence of chips in the code and receives hints in the form of white (cow) or black (bull) chips. The white hint means that the color of a chip is correct, while the black hint means that both the color and position of a chip are correct.

The game continues until the player successfully breaks the code. The game also features daily codes that players can try to solve and compare their results with others. Additionally, players can purchase the ad-free version of the game. Overall, Mastermind Bulls Cows is an enjoyable puzzle game that can keep you entertained for hours.