Easy mode was fun, took a little while to figure out how to set things up. Cool. But apocalypse mode took something like an hour to finish. I had 25 fully upgraded nukes, 2 fully upgraded ion canons and a few fully upgraded bunkers. Lost a few towers to the boss and that was it. But man that took a long to get to. I don't think I touched the game for the last 20+ minutes.
 "Storm the House 3"){kind=icon}
 "PlanetDefender"){kind=icon}
 "P.O.D."){kind=icon}