Complete each achievement to get the allotted gamerscore. The numbers between the () is the points given for each achievement.
| Achievement | How to unlock |
| Go to Hogwarts. (20) | Complete the Grimmauld Place tutorials. |
| Get to the Room of Requirement. (30) | Discover the Room of Requirement. |
| Recruit Dumbledore's Army. (100) | Recruit Dumbledore's Army. |
| Unhinge Umbridge. (100) | Cause chaos in Umbridge's Hogwarts. |
| Finish the story. (100) | Finish the story. |
| Win the Characters Cup. (10) | Meet all characters in the game. |
| Win the Explorer Cup. (10) | Discover all known areas of Hogwarts. |
| Win the Defence Cup. (20) | Cast all defensive spells in a single encounter. |
| Complete discovery level 1. (10) | Discover enough to complete discovery level 1. |
| Complete discovery level 2. (10) | Discover enough to complete discovery level 2. |
| Complete discovery level 3. (10) | Discover enough to complete discovery level 3. |
| Complete discovery level 4. (10) | Discover enough to complete discovery level 4. |
| Complete discovery level 5. (20) | Discover enough to complete discovery level 5. |
| Complete discovery level 6. (20) | Discover enough to complete discovery level 6. |
| Complete discovery level 7. (20) | Discover enough to complete discovery level 7. |
| Complete discovery level 8. (20) | Discover enough to complete discovery level 8. |
| Complete discovery level 9. (20) | Discover enough to complete discovery level 9. |
| Complete discovery level 10. (20) | Discover enough to complete discovery level 10. |
| Complete discovery level 11. (30) | Discover enough to complete discovery level 11. |
| Complete discovery level 12. (30) | Discover enough to complete discovery level 12. |
| Complete discovery level 13. (50) | Discover enough to complete discovery level 13. |
| Win the Portrait Password Cup. (10) | Discover the password for every shortcut portrait in Hogwarts. |
| Win the House Ghost Cup (10) | Find all the house ghosts of Hogwarts. |
| Win the Ornithology Cup. (10) | Find all the flying creatures of Hogwarts. |
| Win the Homework Cup. (10) | Complete all the teacher mini-quests. |
| Win the Grand Master Cup. (20) | Beat all wizard chess champions. |
| Win the Exploding Snap Cup. (20) | Beat all Exploding Snap champions. |
| Win the Golden Gobstone Cup. (20) | Beat all Gobstones champions. |
| Win the Friend of the Year Cup. (20) | Find Luna's lost belongings. |
| Win the Architecture Cup. (10) | Uncover all the hidden Hogwarts symbols. |
| Win the Smuggler Cup. (10) | Find Fred and George's hidden parcels. |
| Win the Secret Statue Cup. (10) | Find the secret chess statues of Hogwarts. |
| Win the Witches and Wizards Cup (10) | Find the hidden wizard plaques around Hogwarts. |
| Win the Nature Trail Cup. (10) | Find all the rare creature tracks hidden in Hogwarts. |
| Win the School Pride Cup. (10) | Tidy up Hogwarts. |
| Finish on hardest difficulty (100) | Finish the story on the hardest difficulty. |
| Secret Achievements | - |
| Win the Studious Success Cup. (20) | Got an 'O' in all lessons. |
| Magic 500 (10) | Cast 500 successful spells. |
| Walk the Platform (10) | Covered 9 3/4 miles. |
| DA Ten (10) | Recruited 10 members of the DA. |
| DA Twenty (10) | Recruited 20 members of the DA. |