Hmmm...
It was fun for a while, aye. I haven't actually played all the games, just the first zombie football one. After Day 12 I just got tired of it because, yes it was fun, but it wasn't really going anywhere. All it was building up to was a bigger more awesome field, but the challenge had long since died once I got my hands on the chaingun. Few let downs (like the zombies being able to come from the back and being bulletproof as long as they were "out of bounds") and the screen pulling got a tad annoying... Overall, not a bad defense game. Rather, a good parody of defense games. There are better ones to whittle away afternoons with, though.
~VelvetDarkRocks~