http://www.howtogeek.com/127343/pick-up-bioshock-and-bioshock-2-for-price-of-a-big-mac-meal/ - Amazon has the Windows-platform version of BioShock and BioShock 2 bundled together for a scant $7.49–81% off the Steam and general retail price. The best part about the promotion is you can either download the games from Amazon or, for those of you that use Steam, you can simply plug the game product key into Steam.