I've played my fill of Dead Rising since its 2006 release, so I probably won't be download it for $19.99 via Games on Demand.
Halo Wars, on the other hand, is a game I've had in my hand many times over the past few years, only to put it down before making it to the cash register. Perhaps I'll find pushing a button much easier than handing over my credit card.
Or maybe I'll just sit there at the purchase screen, hemming and hawing over spending $30 on a real-time strategy game based on a first-person shooter series I'm not particularly fond of, until I eventually B button my way out of the purchase. At least I can do it from the comfort of my couch now.
Games on Demand: Halo Wars and DEAD RISING [Major Nelson]