 The functions of these face buttons vary from game to game but typically the buttons correspond to a four-direction attack scheme (where the "C" button attacks to the left, the "D" button attacks up, the "B" button attacks right, and the "A" button attacks down or does nothing at all.The buttons on the bottom are labeled "ON", "START", "SELECT", "SOUND", "PAUSE", and "OFF".The functions of these face buttons are universal and do not vary from game-to-game.