Harry Potter and the Chamber of Secrets - Platform: XBox

Win Broomstick:
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On the second day of school it tells you to go to the 
Quidditch practice, so go there. Now. Complete the 
training and get a B or higher, and the captain guy 
gives you a free Nimbus 2000 flying broomstick! You 
can fly anywhere around the school, only in day-light. 
You can't land anywhere except where you took off from. 
(Note: You can't fly in the school!)

Take points off Slytherin:
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When Hermione gives you the Polyjuice Potion on the 
second floor in the girls bahroom and you have changed 
yourself into Goyle, go into the Library and get caught 
by the Prefects deliberately and they will take points 
off Slytherin.