Harry Potter And the Half Blood Prince will be released for Wii and DS ahead of the film, you muggles.
As the title suggest the game based on the forthcoming film (due in cinemas July 17). We stopped reading the books at about the fourth one but this episode focuses on Voldem- sorry, He Who Should Not Be Named's past.
If that isn't enough info for you, we completely understand. Go and have a look at ONM's Harry Potter And The Half-Blood Prince preview here for more.