Harry Potter - Official Thread 2!

[Ugly Von]

HBP? I dunno, I never bought that one. I know in the 4th one you can't, you just have this menu and you do the events, you don't get to play out the story.
Here is Wiki though

dateline= Wrote:Half-Blood Prince features the exploration of Hogwarts and casting spells on objects around the school, similar to its predecessor Order of the Phoenix [1]. The game also includes multiplayer games, classes, different times of day, Quidditch, Wizard Duels and Potion making [4]. The Marauder's Map is included in the game, as further progressing can open parts of the school. Harry can also call Nearly Headless Nick to show him around the school

So I think you might be able to.