Harry Potter and the Half-Blood Prince (Xbox 360)

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Achievements

Complete the following achievements to unlock Xbox Live Gamerscore points.

AchievementHow to unlock
Adventure completed ( 100 points )Conclude the adventure.
Combo Flyer Badge ( 10 points )Earn the Combo Flyer Badge.
Crest Collector 1 ( 10 points )Complete Crest Collector Level 1.
Crest Collector 10 ( 30 points )Complete Crest Collector Level 10.
Crest Collector 11 ( 30 points )Complete Crest Collector Level 11.
Crest Collector 12 ( 40 points )Complete Crest Collector Level 12.
Crest Collector 13 ( 50 points )Complete Crest Collector Level 13.
Crest Collector 14 ( 60 points )Complete Crest Collector Level 14.
Crest Collector 2 ( 10 points )Complete Crest Collector Level 2.
Crest Collector 3 ( 10 points )Complete Crest Collector Level 3.
Crest Collector 4 ( 10 points )Complete Crest Collector Level 4.
Crest Collector 5 ( 20 points )Complete Crest Collector Level 5.
Crest Collector 6 ( 20 points )Complete Crest Collector Level 6.
Crest Collector 7 ( 20 points )Complete Crest Collector Level 7.
Crest Collector 8 ( 20 points )Complete Crest Collector Level 8.
Crest Collector 9 ( 30 points )Complete Crest Collector Level 9.
Duelling Beginner ( 10 points )Earn the Duelling Beginner's Luck Badge.
Duelling Champion ( 10 points )Earn the Duelling Club Champion Badge.
Duelling Veteran ( 20 points )Earn the Duelling Veteran Badge.
Good Deed ( 20 points )Help the student retrieve her stolen Gobstone.
Great Mate ( 20 points )Help Ron avoid Lavender.
Great Party ( 10 points )Create a great Christmas party for Slughorn.
Grime Buster ( 10 points )Clean up after Fred and George at The Burrow.
Hidden the Book ( 20 points )Hide the Half-Blood Prince's Potions Book.
Keen Flyer Badge ( 20 points )Earn the Keen Flyer Badge.
Master Duellist Badge ( 50 points )Earn the Master Duellist Badge.
Master of Flying ( 50 points )Earn the Master of Flying Badge.
Master Potioneer ( 50 points )Earn the Master Potioneer Badge.
Portrait Novice ( 10 points )Use your first portrait shortcut.
Portrait Pro ( 20 points )Use all of the portrait shortcuts.
Potions Beginner ( 10 points )Earn the Potions Beginner's Luck Badge.
Potions Club Star ( 10 points )Earn the Potions Club Star Badge.
Potions Club Veteran ( 20 points )Earn the Potions Club Veteran Badge.
Precision Flyer Badge ( 10 points )Earn the Precision Flyer Badge.
Quidditch Beginner ( 10 points )Earn the Quidditch Beginner's Luck Badge.
Quidditch Captain ( 10 points )Assemble the Gryffindor Quidditch Team.
Reflex Badge ( 10 points )Earn the Reflex Badge.
Speedy Brewer Badge ( 10 points )Earn the Speedy Brewer Badge.
Used the Pensieve ( 10 points )View Dumbledore's first memory of Tom Riddle in the Pensieve.

All bonuses

Select the "Rewards" option at the main menu. Press Down, Left(5), Down(2), Right, Down, Left to unlock all bonuses.

Castle Gates two-player dueling pack

Select the "Rewards" option at the main menu. Press Right(2), Down(2), Left, Right, Left, Right, Left, Right, Start. A message will confirm correct code entry.

Easy fights and duels

An easy way to win almost any fight or duel is to cast Levi Corpus or Petrificus Totalus. Then, just charge your Stupefy until it chimes twice, and release it. It will result in a one hit victory until later in the game, then it will require two. Note: This does not work on Fenrir Greyback.

Use the following combo to defeat any enemy. Use Expelliarmus to knock them down. Charge up your Stupefy. While getting it charged, walk directly next to your dueling opponent. Fire your charged Stupefy for a one hit kill. This trick can give you five stars for the challenge very quickly and easily.

Easy Mini-Crests

You can get a large amount of Mini-Crests when you have used the Luck Potion and are making your way to Herbology. At this point, every time you use Diffindo to get the Mini-Crests to appear, you will get the full amount of Mini-Crests available, due to your luck. Get as many as possible at this point to help reach the 25,000 pieces goal.

Hogwarts Crest bonuses

Collect the indicated number of crests to unlock the corresponding bonus.

BonusCollect
Dungbombs in prank boxes around Hogwarts21 Hogwarts Crests.
Even more health in duels71 Hogwarts Crests.
Exploding Cauldrons in prank boxes around Hogwarts48 Hogwarts Crests.
Love Potion in Potions Club98 Hogwarts Crests.
More health in duels8 Hogwarts Crests.
More mini-crests with each cast129 Hogwarts Crests.
Score boost in flying events38 Hogwarts Crests.
Two Player Dueling Pack 1: Draco and Luna3 Hogwarts Crests.
Two Player Dueling Pack 2: Crabbe and Goyle29 Hogwarts Crests.
Two Player Dueling Pack 2: Training Ground Dueling Arena14 Hogwarts Crests.
Two Player Dueling Pack 4: Paved Courtyard Dueling Arena113 Hogwarts Crests.
Two Player Dueling Pack 4: The Transfiguration Dueling Arena59 Hogwarts Crests.
Two Player Dueling Pack 5: Ginny and Hermione84 Hogwarts Crests.

Knocking down crests

Find the crest you want to knock down. Cast Wingardium Leviosa on the object you want to use to knock it down. Note: This object can be anywhere and does not have to be in throwing range of the crest. Using either a Dung-bomb or an Exploding Cauldron is recommended. Once the object is in the air, hold [Run]. You can now walk around the castle and grounds while still carrying the object in the air. Make sure that you keep [Run] held until you get to where the crest is located. Note: During this time Harry will not run fast. Throw that object at the crest to knock it down.

Secret Achievements


AchievementHow to unlock
Burrow Defender ( 20 points )Successfully protected The Burrow.
Escaped the Cave ( 40 points )Escaped the Cave.
Mystery Solved ( 20 points )Retrieved Slughorn's missing memory.
Quidditch Champion ( 30 points )Won the Quidditch Cup.

The match

Playing match is very easy. You must fly through all the stars in the sky to catch the snitch. Passing all stars is not required if the star's color is going from red to light. This indicates your time is going over, so try to pass through most of the stars in the sky.

Unlock Everything

Go to the Rewards sub-menu from the Main Menu, where you see the two choices, Badges and Credits. Using the d-pad, enter the following code to unlock everything: Down, Left, Left, Left, Left, Left, Down, Down, Right, Down, Left.