XBOX 360-Harry Potter And The Half-Blood Prince

Unlockables
Collect the indicated number of Hogwarts Crest to unlock the corresponding bonus:
Dungbombs in prank boxes around Hogwarts: 21 Hogwarts Crests
Exploding Cauldrons in prank boxes around Hogwarts: 48 Hogwarts Crests
Love Potion in Potions Club: 98 Hogwarts Crests
More health in duels: 8 Hogwarts Crests
Even more health in duels: 71 Hogwarts Crests
More mini-crests with each cast: 129 Hogwarts Crests
Score boost in flying events: 38 Hogwarts Crests
Two Player Dueling Pack 1: Draco and Luna: 3 Hogwarts Crests
Two Player Dueling Pack 2: Crabbe and Goyle: 29 Hogwarts Crests
Two Player Dueling Pack 2: Training Ground Dueling Arena: 14 Hogwarts Crests
Two Player Dueling Pack 4: Paved Courtyard Dueling Arena: 113 Hogwarts Crests
Two Player Dueling Pack 4: The Transfiguration Dueling Arena: 59 Hogwarts Crests
Two Player Dueling Pack 5: Ginny and Hermione: 84 Hogwarts Crests
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.
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.
Lion statue locations
Crest locations
Clocktower (0:07), Covered Bride (1:45), Entrance Courtyard (2:07), Grand Staircase (3:36), Gryffindor Common Room (4:59)
Hospital Wing (0:07), Owlery (0:38), Potions (1:46), Potions to 7th Floor Dungeon (2:48), Quidditch Gate (4:33), Viaduct (6:10)
Astronomy Tower (0:06), Boathouse (1:29), Charms (2:22), Clocktower Courtyard (2:56), Dungeon to Paved Courtyard (3:58), Floor 1 (4:25), Floor 3 (5:13), Floor 7 (6:22)
Hagrid's Hut (0:06), Herbology (1:18), Herbology Hallway (2:27), Library (3:26), Owlery to Quidditch Passage (4:51), Suspension Bridge - Training Ground Passage (5:59), From Boathouse to Paved Courtyard (6:39)
Paved Courtyard (0:06), Slughorn's Office (2:49), Stone Bridge (3:14), Stone Circle (3:40), Suspension Bridge (4:27)
Training Ground (0:06), Transfiguration Courtyard (4:30), Viaduct Hallway (6:10)
Achievements
Accomplish the indicated achievement to get the corresponding number of Gamerscore points:
Grime Buster (10 points): Clean up after Fred and George at The Burrow.
Used the Pensieve (10 points): View Dumbledore's first memory of Tom Riddle in the Pensieve.
Quidditch Captain (10 points): Assemble the Gryffindor Quidditch Team.
Great Party (10 points): Create a great Christmas party for Slughorn.
Good Deed (20 points): Help the student retrieve her stolen Gobstone.
Great Mate (20 points): Help Ron avoid Lavender.
Hidden the Book (20 points): Hide the Half-Blood Prince's Potions Book.
Portrait Novice (10 points): Use your first portrait shortcut.
Portrait Pro (20 points): Use all of the portrait shortcuts.
Adventure completed (100 points): Conclude the adventure.
Crest Collector 1 (10 points): Complete Crest Collector Level 1.
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.
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.
Potions Beginner (10 points): Earn the Potions Beginner's Luck Badge.
Speedy Brewer Badge (10 points): Earn the Speedy Brewer Badge.
Potions Club Star (10 points): Earn the Potions Club Star Badge.
Potions Club Veteran (20 points): Earn the Potions Club Veteran Badge.
Master Potioneer (50 points): Earn the Master Potioneer Badge.
Duelling Beginner (10 points): Earn the Duelling Beginner's Luck Badge.
Reflex Badge (10 points): Earn the Reflex Badge.
Duelling Champion (10 points): Earn the Duelling Club Champion Badge.
Duelling Veteran (20 points): Earn the Duelling Veteran Badge.
Master Duellist Badge (50 points): Earn the Master Duellist Badge.
Quidditch Beginner (10 points): Earn the Quidditch Beginner's Luck Badge.
Precision Flyer Badge (10 points): Earn the Precision Flyer Badge.
Combo Flyer Badge (10 points): Earn the Combo Flyer Badge.
Keen Flyer Badge (20 points): Earn the Keen Flyer Badge.
Master of Flying (50 points): Earn the Master of Flying Badge.
Additionally, there are four secret achievements:
Burrow Defender (20 points): Successfully protected The Burrow.
Mystery Solved (20 points): Retrieved Slughorn's missing memory.
Quidditch Champion (30 points): Won the Quidditch Cup.
Escaped the Cave (40 points): Escaped the Cave.