The Ubisoft Online Store Online as well as places like GameStop PC Downloads and Steam now offer Assassin’s Creed III: The Battle Hardened Pack, a multiplayer expansion for Ubisoft's assassination sequel:

The Battle Hardened Pack extends the Assassin’s Creed® III multiplayer experience with three new playable characters and maps, plus awesome bonus items! Become the influential Governor, the resilient Highlander, or the fearsome Coyote Man. Journey through Charlestown, Fort St-Mathieu, and Saint Pierre as you stalk your enemies and fight to protect your team. Rally your troop, discover your power in numbers, and ignite the revolution!