Zombie lunatics are attacking the city in broad daylight! Grab your SWAT weapons and let's grind some zombies into ground meat. You must protect the city, and above all, the president!
You were kidnapped by terrorists and brought to a castle far away from the civilization. They force you to construct a nuclear bomb for their next big attack so it's your job to escape the castle.
Protect your radio transmitter from a zombie apocalypse! You and your friends are stuck in a small town with your supplies running out. The radio transmitter on the roof of your building is your only hope for salvation!