The galaxy is under attack by the Saddies. The Saddies are out to claim the last remaining soul in the world. The player needs to defend his soul by controlling a space vehicle named the SGD-37. To do so, he can collect various power-ups to shoot the Saddies down.
Saddies: Attack!! is a horizontal shooter game in which the player controls a laser cannon by moving it across the bottom of the screen by tilting the device (or using the arrow keys) firing at Saddies.