To download the demo, click here and select your country.

The videogame will be available in the United Kingdom from June 30th.

Many thanks to The Leaky Cauldron for the tip! :)

Moreover, IGN has released a report from sampling the Wii version of the Harry Potter and the Half-Blood Prince videogame.

In my time with the game, Harry has been challenged to prove himself as the Quidditch team captain. In this year's game, Quidditch has thankfully returned, but it probably doesn't play as you think it might. Rather than direct control over the famous seeker, you point at the screen with the Wii remote and guide Harry through a series of stars placed around the field. I suppose the developer decided upon this control method because it is easier for anybody to pick up and play and truth be told, it works very well, enabling a very fast sense of speed and therefore intense Quidditch matches. You can still bump opponents out of your way by guiding Harry into them with the on-screen reticule, which works well.