Left 4 Dead 2 ? It's a fun game. It's made even better thanks to all the amazing mods the community has created. Enjoy this compilation of Teletubbies, raptors, Koopa Troopas, Storm Troopers, cats, Justin Bieber, My Little Pony, Aliens, and so much more craziness.
[Thanks, Lucas!]
via destructoid http://www.destructoid.com/the-wonderful-world-of-left-4-dead-2-mods-258990.phtml