Mirror Breaker Achievement
I discovered after two different runs that the realization "Mirror Breaker" is obtained only one way. There is nothing complicated, however, and the solution even manages to avoid a confrontation with the ghost of places.
In the first step, you have to pick up directly the bricks lying on the ground on the left. Do not go to the bathroom for the moment. Start by destroying all the mirrors in the room until a cloud of butterflies appears.
From that moment, success should be unlocked, which was the case for me. If this is not the case, go to the bathroom to sound the tape recorder and continue the progression until you get it.