Bowser and his army has destroyed your bank and took all the coins. Now, he's headed towards the castle to capture the princess. It's up to Luigi to defend the castle while Mario's away. Buy weapons and castle repair units at the weapon shop using the coins you collect from the enemies. Choose from weapons such as: Magnum, Uzs, Shotgun, Assault Rifle and Plasma Assault Rifle to defend the castle. Don't forget that you also need to buy ammo for your weapons as well so use them wisely. Stop Bowser and his army before they level your castle. Four levels of difficulty: Easy, Medium, Hard and Insane.