The Sinclair Solutions Tester Pack DLC is now available for the Windows version of BioShock 2, 2K's first-person shooter sequel. The DLC will be on sale through Microsoft Games on Demand starting tomorrow, offering the chance to get the add-on bundled with the game for a 400 MS point profit. They offer BioShock 2 for 25% off from 3/12 to 3/15, and for that period the add-on will be 400 Microsoft Points, but if you buy the DLC along with the game you will receive a gift of 800 MS points.