Here is a list of all the bloopers that appear in the PC game of Harry Potter and the Half-Blood Prince. So far there are 5 mistakes.
- The Burrow is on a different place then it was before. There is no lake and there are no animals. 
- Draco Malfoy say that he will come later to Gregory Goyle and Vincent Crabbe and instead of Blaise Zabini and Pansy Parkinson. 
- Draco sees Harry Potter at the window, not at the door. 
- Potions class has been a different class then in other years. 
- Also it's given to the other side of the castle.