The Left 4 Dead 2 demo is live and available for download on Xbox 360 and PC. Featuring gameplay from the first two (of five) chapters from "The Parish" campaign, the demo is set in the New Orleans French Quarter and is playable in Campaign mode. Keep an eye out for all-new guns, melee weapons, items, Special Infected and "Uncommon Common," a new campaign-specific set of zombies with unique abilities.