Mystery Of Magic - Version 0.2.0p by Forest Fairy Win/Mac/Android

This game takes place in the parallel universe. So it might be slightly different from the canonical one.
Professor Albus Dumbledore was killed by The Dark Lord. The Ministry of Magic forbid all the students of Hogwarts which were not yet 18 years old take classes for this dark period.
Severus Snape was put into Director's role.​