Harry Potter and the Half-Blood Prince Cheats for Xbox 360

Select the 'Rewards' option at the 'Main' menu and with your D-pad enter Right(2), Down(2), Left, Right, Left, Right, Left, Right, Start. If you have entered the code correctly you will receive a confirmation message.

At the 'Main' menu go to the 'Rewards' sub-menu where there will be a 'Badges' and 'Credits' option. Then using the d-pad enter the code Down, Left, Left, Left, Left, Left, Down, Down, Right, Down, Left to unlock Everything.

When you collect the indicated amount of crests which are found around Hogwarts the corresponding Single and Multiplayer bonuses will become available.
3 Hogwarts Crests:
2-Player Dueling Pack 1: Draco & Luna
8 Hogwarts Crests:
More health in duels
14 Hogwarts Crests:
2-Player Dueling Pack 2: Training Ground Dueling Arena
21 Hogwarts Crests:
Dungbombs in prank boxes around Hogwarts
29 Hogwarts Crests:
2-Player Dueling Pack 2: Crabbe & Goyle
38 Hogwarts Crests:
Score boost in flying events
48 Hogwarts Crests:
Exploding Cauldrons in prank boxes around Hogwarts
59 Hogwarts Crests:
2-Player Dueling Pack 4: The Transfiguration Dueling Arena
71 Hogwarts Crests:
Even more Health in duels
84 Hogwarts Crests:
2-Player Dueling Pack 5: Ginny & Hermione
98 Hogwarts Crests:
Love Potion in Potions Club
113 Hogwarts Crests:
2-Player Dueling Pack 4: Paved Courtyard Dueling Arena
129 Hogwarts Crests:
More mini-crests with each cast