BrainTwister Cost: $9 Get the full version     Trial version     Developer's Website Contacting third-party download site please wait. If your download does not start, click here, or get the full version Descriptions BrainTwister: BrainTwister is an original variant of Mastermind, a popular logic game, also known as Bulls & Cows. The object of this game is to break the secret code in the least steps possible. With BrainTwister you can train your logic and deduction or merely enjoy endless game combinations. Unique features of this game are fully customizable rules, so that you can select from very easy to extremely hard.