There is a normal mode, where the goal is to defeat all the enemies. There is also a survival mode, where you have to stay alive until help arrives. The "Protect the Chickens!" mode's aim is to keep at least one Chicken alive at the end of a level.
There is a normal mode, where the goal is to defeat all the enemies. There is also a survival mode, where you have to stay alive until help arrives. The "Protect the Chickens!" mode's aim is to keep at least one Chicken alive at the end of a level.