This has been done before, of course, but not with Apple backing those efforts. Companies like ION Audio and its iCade have brought hardware add-ons, though they required developers to tweak their games in order make those things work. This new option from Apple also requires that, but aims for a standardized set of controls that developers can plug into their software, and that come baked into Apple's iOS and OS X software development kits.
We've rounded up a list of 49 games for the iPhone and iPod Touch that we think would play better with physical controls. Some already have support for the iCade, and other such solutions. Many are top sellers, and plenty of fun to play with touch controls. We've also broken them down by genre, from sandbox games all the way to endless runners.