The enemies are trying to enter your country and they are planing something big. America's finest agent was sent to destroy enemy base and kill them all. Destroy the base, kill all the enemies and get your base back.
The world has gone to hell and the zombies are taking over. Play as both human and zombie in which you can only interchange between human and zombie 5 times.
When your balloon crash-lands in a wasteland of fowl creatures, its time to survive. Upgrade your weapons, fort, and turrets while you try to fix your balloon.