it was all about starting massive wars for me, find areas full of npcs walk between them so they 'accidentally' hit each other and watch the mayhem that ensues, sadly i think i spent more time doing that than actually playing the game the way it was meant to be played, well assuming it wasn't meant to be done that way :)
 "Block Territory"){kind=icon}
 "Doom 1"){kind=icon}
 "Ultimate War"){kind=icon}