I'm currently looking on this game: http://www.giantbomb.com/dragon-fantasy-book-ii/3030-39473/
And it says "First release date: Q2 2013"
While browsing the same game with the API: http://www.giantbomb.com/api/game/39473/?api_key=yourkey
You only get:
Which doesn't match up with the "Q2 2013" information.