GameTrailers has details on plans to add a fifth playable class to Borderlands 2 via post-release DLC. The class is called the Mechromancer, a play on its ability to control mechanized units. Word is this will be launched for free a couple of month's after the role-playing shooter debuts in September, though it's added that this is a "day one purchase incentive," so it may not be free for those who dally in buying the game.