This game is simply awesome as fuck! It's great. Plus there's nothing like some good old killing zombies with a chainsaw! I loved it. The extra addition of perks/weapons; made this a very enjoyable game with a very high fun-factor. It's pretty addicting too. Plus the medals are relatively easy to obtain, with a little time-grinding.
The 3-D graphics were a nice touch for the game, and it really improved the overall atmosphere of it. Good character design as well! Sound/song quality was great and an enjoyable track to hear played through the hordes of zombies I killed.
Above all, great work!