It's almost Halloween and EA wants to help gamers get in the spirit. Starting tomorrow EA's Dead Space will be available for only 19.99 on the XBL service Games on Demand. Take control of Isaac Clarke and see if you can solve what exactly is going on in the space station. Games on Demand allow you to buy full games and download them right to your Hard Drive. Dead Space is a perfect game for this week and at 19.99 it's a good deal.