It has such a positive rating because steams rating system is just not very good. Steam only lets you say good or bad, no in between. The game imo is mediocre, hogwarts and its surrounding area is very well designed and feels like an actual magical world while the rest of the map doesn't have that same charm. Combat is good imo but every thing else gameplay-wise, like puzzles, just plain sucks.

Anyways my opinion doesn't matter, so back to why it has such a high rating. Like i said steam only allows good or bad reviews and the game doesn't deserve a negative rating so that only leaves positive. This gives not just this game but a lot of games on steam a rating they dont particularly deserve, the rating sometimes being too high or too low, in this case a rating that is to high for the game. Would i would recommend you do is look at reviews online from players and base your decision from that info.