The iOS App Store might already have its fair share of addictive and compelling games on offer, but when John Carmack comes calling with his latest megatextured shoot-em-up, you've got to sit up and pay attention. Rage HD: Mutant Bash TV isn't so much a full-fledged game in its own right as it is a teaser for the forthcoming Rage FPS for the PC, and yet even in its pretty limited runn
