The Harry Potter and the Philosopher's Stone game became the fastest-selling of the year, with more than 300,000 copies sold in just five weeks.

The game provides an opportunity for muggles everywhere to master magic as they travel from Privet Drive to Hogwarts, meeting everyone from Hermione Granger, Ron Weasley and Rubeus Hagrid to the Dursleys and Albus Dumbledore.

Players must sneak, climb and jump as they explore 3-D environments based on Hogwarts and its grounds and battle evil creatures using Harry's abilities.

They can uncover special items along the way, including the invisibility cloak, wizard sweets, potion ingredients, chocolate frogs, famous wizard cards and broomsticks.

When he is not adventuring, Harry can leap on to his broomstick to play Quidditch, winning valuable house point for Gryffindor.

The game is an experience no Harry Potter fan can afford to miss.

Evolution has a number of Harry Potter prizes to give away.

The first prize includes a Harry Potter inline scooter, a bedding set, a pair of bookends, a mirror clock and a copy of the Harry Potter and the Philosopher's Stone game for the PlayStation.

Two runners-up will each win a copy of the PlayStation game.

For your chance to win the goodies and the games, answer the following simple question:

Who is head of the Slytherin House at Hogwarts?

a) Professor McGonagall b) Professor Snape c) Professor Sprout d) Professor Flitwick Send your entry to: Evolution, Argus House, Crowhurst Road, Hollingbury, Brighton BN1 8AR by January 29 to be entered into the draw.

Please mark your envelope "Harry Potter videogame". Usual rules apply.

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