Infectionator is very cool flash game about zombies. In this game, you spread your disease and make zombies. Eventually, you go and destroy all the world with your zombie disease. It's sorta like Pandemic 2, only with more action. For example, you can call up zombie characters like...MJ. Here's their description of the game:
Zombie infections madness, turn people into zombies in 60 seconds, upgrade your zombies to more powerful ones, get the highest score by destroying and infecting the town
Instructions: Use mouse to infect, throw grenades, and call up other zombies.