In this game you are the leader of a group of survivors and you must fend off hoards of zombies that get more and more difficult. You must strategically purchase units to defend your trailer park, but at the same time you must also save up money to purchase upgrades for your trailer park to help pass the levels. The levels get harder and harder as you progress, this makes for a fun but challenging game that may have you smashing your computer screen in rage... have fun playing!