On Xbox 360 the maps are still limited and you can't play with mods or custom maps only Official Campaigns or DLC Campaigns. The original games were released on PC & Xbox 360 exclusively, but sadly they never made either Left 4 Dead game on Playstation 3. The Steam Community in particular has been making mods & custom maps for both games and they still do. Over the years the Left 4 Dead Community has become a very big community, people have made fond memories of teaming up & surviving the zombie infection in Left 4 Dead & Left 4 Dead 2 and still do to this day.