"This game is based on Desktop Tower Defense..."
It's right in the "help" section of the game. (That should end the debat for a few minutes. *chuckle*)
Thanks molicious13... that was exactly the strategy that (almost) worked for me! But holy ¢%@& that gets tough at the end. Underestimated just how much firepower I was going to need. Ouch!
4.6 billion pop, $195 trillion in the bank on "hard"... and yet I still can't figure out a strategy to get past the first 30 waves or so on apocalypse. *sheesh*