"Class 3 Outbreak is a zombie RTS running on Google Maps(R). Struggle to keep the zombie infection at bay with a hopelessly outnumbered police force, squash any outbreaks that appear and keep the zombie threat level at Class 1, or the infection will quickly spread out of control."

http://www.class3outbreak.com/

Video: http://www.youtube.com/watch?v=g-YQ-svmjjQ

Demo: http://www.class3outbreak.com/zombie-outbreak-simulator/