Your kingdom has been constantly attacked by a series of monsters that are trying to destroy the peace of the people in the citadel. Basically, they attack the citadel to take the abundant resources that the people have taken and stored. However, the knights and advisors in the citadel are not easy to deal with. They also have some power from intelligence and magic. So they will build watchtowers along the path of the monsters marching to the gate of the citadel. Wall Tower Defense gives players a difficult problem and the tools to solve it.