I'm not sure what the catch is, or if there is one, but IGN is offering Hitman Go for free. I've wanted to have the game ever since I watched Brad and Vinny strain their brains on it.
Here is the link: http://www.ign.com/prime/promo/hitman-go-free
I'm not a prime member on their site, I just clicked get free game on my iPad browser, clicked the code, and installed it.
Referenced from Slickdeals: http://slickdeals.net/f/7182808-free-game-of-the-month-hitman-go?sdxt01=internal&sdxt02=Deal+Bit&sdxt03=For+Thread+7182808&sdxt04=slickdealsindex