Imagine this, you are on your computer minding your own business reading planethalflife.com articles then all of a sudden you hear what sounds like fighting. You get up to see what is going on and you are witness to a Zombie attack and every person the zombie defeats turns and joins his ranks. Soon you find yourself surrounded with all other humans being taken down and turned in to zombies. That is just a sample of what you get from Zombie Panic.
In this mod you must battle a never ending invasion of the undead until there is only one human left standing. You must use the terrain and lighting to your advantage. Hide in the darkness to stay away from or to stalk your prey. Use objects to gain elevation in order to keep watch for your enemy. But the most essential part of this mod is teamwork. If you try to run around solo like you are some sort of superhero you will find yourself changing over to a zombie mighty quickly.