Get out your wand and get ready for some magic to happen, because we’re about to give away one copy of Harry Potter and the Half-Blood Prince for Xbox 360 at 3:00PM PST/6:00PM EST! (HPHBP is also available on Nintendo Wii, Nintendo DS, PlayStation 3, PSP, and PC).

Here’s how it’ll work:

• We’ll ask a question to start off the giveaway— for this Harry Potter and the Half-Blood Prince giveaway, we’re going to pick the 10th person who @replies to us with the correct answer as the winner.

• How do we choose the winners?  We’ll be using search.twitter.com to find the 10th correct answer.  We will NOT count multiple entries from the same Twitter name.  Once we’ve announced a winner, it’s final.  Didn’t win?  Don’t fret— you’ve got 8 more days to win some family-friendly gaming goodies from us, and there are great deals in stores right now on our games, so you can still bring all the magic of Harry Potter home for the family!

• How do I know if I’ve won?  We’ll announce who the winners are once we’ve picked them.  If you’ve won, we’ll DM you to find out your mailing address.

• One more rule: We can only accept winners who live in the USA or Canada.  Sorry— we wish would could send out prizes to our international friends as well, but it costs us a bunch to ship out!  (If someone with an international address is chosen as the winner of this giveaway, that entry will be thrown out and we’ll pick a new winner).

Thanks for playing with us, and have fun!