Addictive
Lovin it, and man does survivor get intense!
This game blows Last Stand out of the water. It has tons of enemy types and a huge weapon selection. However, I noticed a disappointing omission of some of the weapons which are a staple of zombie games, including the chainsaw and the flame thrower, please do implement these in this game.
What you need to add are some huge, slow-moving juggernauts that players have to worry about for minutes at a time while fighting off other, weaker zombies; bosses, if you will.
Also: grenades?
As it is, this game is addictive. Make it awsomely addictive