Rampart

Many people call the game a strategy game, but they are wrong. It is rather a mixture of arcade and logic. You choose a fortress to defend and stop cannons on its territory. During the turn, you control the sight and fire cannonballs at the ships and they at you. You have to calculate the ballistics of the cannonball's flight. After the battle, you have a limited amount of time to extend the boundaries of your citadel or rebuild the walls (by assembling them from pieces of different shapes). Then you set up new cannons and return to battle.