nerdology:

Mario 64 Dead

Someone from Valve’s amazing userbase has created a Mario 64 campaign in Left 4 Dead.  It’s these things that make me strongly consider purchasing L4D2 on PC.  You will never see awesome user created content (or any user created content for that matter) on the Xbox.

[Joystiq]

This is awesome. I want to kill Zombies on the princess slide