Game: FindIT 2

Anyone who grew up reading Highlights! as a kid played has "Spot The Difference" games at some point (albeit of the non-digital variety). The idea is pretty self-explanatory: you take two images of the same scene, put them side-by-side, and spot the minute changes that have been made between them. While they may not sound exciting, such games can work well on the iPhone, provided they're done right. FindIT 2, the sequel to FindIT, is about as exciting a time as you can expect to have with such a game thanks to the high-quality imagery and the ability for users to create new content.