The Defiance website has details on a DLC pack called Castithan Charge coming to Windows, Xbox 360, and PlayStation 3 on August 20th to the TV tie-in MMO shooter. This brief trailer teases the release, and they offer a feature list for the pack:

• Play as a Castithan (you can even convert your current character if you’d like!)
• Battle against the Volge in massive Siege battles
• Access new Battle Arenas and earn a Castithan Blade reward
• Duel other players in best-of-three matches
• Drive the Raptor Truck, Defiance’s first 4-player vehicle
• Fight with the new charge weapons, including pistols, shotguns, and sniper rifles
• Plus: new pursuits, new story lines, and more