Psychonauts

Story Related, cannot be missed.

Once you complete the Milkman Conspiracy level, the guard will allow you further in the castle grounds. While on these grounds you will encounter an actress named Gloria so delve into her mind to solve her unrest. Once inside her mind the level will task you with finding the right play, the right set and using the correct mood to trigger an air balloon which you will need to fly higher in the level to fight the Phantom. You obtain plays from the audience member "Jasper" who is on a balcony on the far right side of the level. To trigger the air balloon you need the final script, a sad mood and the alternate set with poles on it. Once you've triggered the air balloon, you will go through a platforming segment before fighting the Phantom. After defeating the Phantom, the trophy will unlock.

Boss Tips:

The Phantom is another simple boss, when the battle begins use your air Levitation (while in the air press ) to ride the notes on the trumpet behind you up to the rafters. Once you're on the rafters use your Pyrokinesis power to light the candle next to a headlight to disorient the Phantom. When he is disoriented, he will be open to attacks so go back down to attack him then he will destroy the headlight you just used. Repeat two more times to defeat the Phantom.