If you love crime and dramas, like NCIS type stuff, or the Bone Collector, you'll love Criminal Case for your iPhone, iPod or iPad.
This iPhone game works great offline and you'll be in charge of customizing a character, getting a partner in crime, then start investigating and examining crime scenes all over the city.
Being able to analyze clues or things left behind, find targets, then interrogate witnesses and suspects makes this game better than many in this genre. It's quite impressive, really, that the entire game works offline. Be the detective.