http://www.horrorchannel.com/dread/modu ... =0&thold=0
Think the freedom of GTA, plus zombies, plus RTS, and you got this game. The site gives a great description. However for a short one...
Corp controls city. You spy on them and see they are corupt. They catch you and turn you into a zombie. You can control other zombies. You escape, you want revenge. City Folk are in your way. You deal with them
By the way, the creators are HUGE romero fans, and it shows in their work.