Stay in front of your opponent as long as you can and pick up every boost which is dropped. Also try to stay 160 points ahead of your opponent at all times so that if your opponent catches the snitch (150 points if grabbed) you will still win the game.
The Golden Snitch
Collect all the other Quidditch cards to get this one.
Unlock American Stadium
Make sure to win 6th World Cup Match (Nimbus 2001 Difficulty).
Unlock Australian Stadium
Make sure to win 6th World Cup Match (Nimbus 2001 Difficulty).
Unlock Bulgarian Stadium
Make sure to win 7th World Cup Match (Nimbus 2001 Difficulty).
Unlock English Stadium
Make sure to win 1st World Cup Match (Nimbus 2001 Difficulty).
Unlock French Stadium
Make sure to win 5th World Cup Match (Nimbus 2001 Difficulty).
Unlock German Stadium
Make sure to win 3rd World Cup Match (Nimbus 2001 Difficulty).
Unlock Hogwarts - Summer
Make sure to complete Tackling Challenge.
Unlock Hogwarts - Winter
Make sure to win Hogwarts Cup.
Unlock Japanese Stadium
Make sure to win 2nd World Cup Match (Nimbus 2001 Difficulty).
Unlock Spanish Stadium
Make sure to win 4th World Cup Match (Nimbus 2001 Difficulty).
Unlock The Nordic Team Stadium
Make sure to win 7th World Cup Match (Nimbus 2000 Difficulty).
Unlocking Items
By winning Seeker, Passing, shooting, tackling, and Bludger challenges you will unlock extra items. By winning Quidditch World Cup matches you will unlock team photos, stadiums, logos, and special moves.