I have 2 things to say. 1. It is really epic when you are fighting a swordsmen and both of you have low health. You both strike at the same time. You decapitate him, but you die. That is fun. 2.It is SOOOOOO much fun to decapitate people with the 2 sided spear thingy.
Best strategy for finishing the game: set up 4 ion guns, save up $400,000 create 2 super soldiers and 5 tanks. It will then play out. (super soldiers can take down the base with 5 hits)