Harry Potter turns 18 it's a sandbox made on Renpy platform. You have a wide variety of choices what to do in the game. The game will futures many fetishes like Incest, BDSM, Voyeur, Gender Bender......
If you receive an exception error, most of the time, it's safe to click "Ignore" a few times and keep playing.
If you don't see the game menu after loading in, try resizing by using cinema mode.
If nothing works, please use the report button.