Left 4 Dead 2 Custom Campaign: Facility 13 w/Heph, Itchy and Sponge
A bit different, but Heph and Itchy are really good friends. Same as Sponge :) Enjoy the video :)
Heph: / hephaestionn
PTG (Itchy is the main uploader, but is shared with other people): / projectthoseguys