Harry Potter And The Half-Blood Prince Cheats (Xbox360)

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, all of which are currently unknown:

Secret achievement (20 points): Unknown. 

Secret achievement (20 points): Unknown. 

Secret achievement (30 points): Unknown. 

Secret achievement (40 points): Unknown.