If you fully upgrade more then one type of tower then those types of towers get a stat boost for each additional tower made (For example if you have 3 fully upgraded sniper towers they all get a +10 bonus to range.)
Building an army to protect your fortress and destroy your enemy? Battles between elves, orcs, men, and zombies? That sure is original!(Note for the ignorant: that was ironic)
Once upon a time there was a girl living in dirty house. There were also two boys living in a castle. The girl captured one of the boys but the other on became a knight and killed here. And that is the story of the first homosexuals.