An evil force has swept into your land. Their sole purpose is to destroy everything, and everyone in their path. Repel these beasts before all is lost. Upgrade your base, and unlock special units to clear 5 levels and claim victory.
Help the survivors to build their base camp and defense against hordes of zombies that have been infected by a mysterious global outbreak of a brain affecting virus.
Protect the flora against the invading monsters by building your army of plants. Design your own path with defense units. Juggle the exit gates to confuse the incoming monsters.
The world suffers from oil crisis and you have to defend the last desert oil-base from the incoming enemies and armored vehicles. Earn experience points to get new weapons and don't forget to use power supplies dropped by allied aircraft.
