During the Dark Winter crisis, there is a new tide of chaos rising from the underworld of New York City. In this first paid expansion, Underground, dive into the underbelly of New York with up to three friends to save what remains. Explore the randomly generated mazes of subways, tunnels, and sewers to fight deadly enemies and recover powerful loot. Experience an all-new incursion and find the latest weapons, gear and more. Ubisoft will also be simultaneously releasing a free update made available to all purchases of the base game that will include more challenge mode missions and a new level of difficulty for main missions and incursions, the heroic mode.