CARDINAL is a minimalistic puzzle game developed by Perfect Hat Games LLC, available on the iPhone platform. The game offers a unique challenge where players are presented with sixteen different cards and rules to decipher the secret solution. Utilizing the cardinal rule, players must creatively deduce the solution, leading to a satisfying gameplay experience.

In the regular mode, players can immerse themselves in an endless array of procedurally generated boards, providing a continuous challenge. For those seeking a competitive edge, the daily competition feature allows players to test their skills against others worldwide, adding a competitive element to the gameplay.