Press the following key combinations to access the corresponding cheat: A, Left, A, B, A, Right, A, C, A - All weapons and keys. Up, Right, L, Up, Right, Right, R, A, Left - Additional screen sizes. Up, Right, A, B, A, Down, A, L, L - Toggle god mode. Up, Right, A, B, A, Down, A, LS (2X) - Toggle invincibility power-up. More items...