Zombies. Man, they are everywhere. And one of the most important rules is always this: Never go Anywhere Alone!

Thank god this game embraces that philosophy to the extent.

Left 4 Dead 2 provides a phenomenal co-op experience. Playing with your friends, whether in the same room or online, is awesome. If none of your friends are available, the single-player campaign is fun all on its own, thanks to some really efficient AI. New enemy types lead to a delightful variety of ghouls to destroy.

Why the ten?

-perfect co-op experience

-responsive AI

-astounding graphics

-zombie clowns