Left 4 Dead was already a great game and this new DLC, while overdue, is something that will definitely expand the lifespan of the game by a good long while. The only regrettably missing feature is the SDK for the PC version that would allow players to create their own maps and campaigns. Otherwise players on the Xbox 360 will find the Survival pack to be a great addition for those looking to keep their wallet in check. What are you waiting for? Go download it now. IT'S FREE!