Tower defense: funny phrase. You don't defend the tower (most of the time), but rather it's the tower that defends your territories from incursion.
It isn't "tower defense" so much as "defense by tower". What you defend is a much broader fictional space. You don't defend a barracks or an archer's nest.. you defend a 'realm' of some kind.
If you think of TD as a lens for real life, as I sometimes do, then what do you really defend? And why do you defend it?
Sent from my Orac M-BRANE FieldTouch (Plus).