The Left 4 Dead supports user-created maps. The classic Halo: Combat Evolved map Hang 'Em High map has been made for Left 4 Dead. Please note that this map is not representative of L4D gameplay or graphics. Left 4 Dead was the 2008 Game of the Year and for all of you folks that are new to L4D, this map doesn't do the game justice. Still, it is great to see somebody playing on Hang 'Em High - my favorite Halo map of all time.