Game of Thrones: The RPG will be released on 15 May in the United States but, completely inexplicably, won't be out in Europe until 1 June (since clearly it takes two weeks for digital information to cross the Atlantic). The publishers, in their wisdom, have also decided the release the game on the same day as Max Payne 3 (one of the biggest games of the year on both console and PC) and Diablo III (probably the biggest game of the year on PC). In fact, they've somehow managed to cross with both dates for Max Payne 3 (which is out on 15 May on console and 1 June on PC).
I can only conclude at this stage that the publishers don't actually want anyone to play the game. There's some very strange decision-making going on there.