Just as expected, today marks the release of two new Games on Demand titles: Dead Rising and Halo Wars. Major Nelson reports each is currently available for download on your Xbox 360, with Capcom's virtual mall full of zombies setting gamers back a paltry $20, while Ensemble Studios' final game is a bit more costly at $30. Each will take up six gigglebytes of room on your HDD upon download. Shortcut: Halo Wars on Games on Demand [Xbox.com] Shortcut: Dead Rising on Games on Demand [Xbox.com]