2. XCOM: Enemy Unknown
It's not often we see large, modern games ported over to iOS. This list is filled with older, updated titles of niche games and classics from past generations. XCOM: Enemy Unknown's iOS port breaks this cycle, and serves as proof that iOS ports are getting better. Released last October as a high profile, AAA console and PC game, Enemy Unknown was both commercially and critically successful, and cited as one of the best games released in 2012.
A mere eight months later, Enemy Unknown plays just as well on the iPad as its PC and console counterparts, which was quite the surprise. Sure, entering and exiting buildings may be a bit more difficult, and certain graphical assets are downgraded on the iPad, but neither of these issues take away from the fact that this is a remarkable port of a high profile game.
Take our word for it. XCOM: Enemy Unknown fits on the iPad. Combating an alien threat, repurposing extraterrestrial technology, and managing the panic levels around the world feels like it was made for a portable touch screen.