Congrats. I have lost my humanity
Your character's goal is to become visible again
Your goal (as a player) is to push the character losing as much sanity as possible.
Staring at reflective objects such as water in barrels, ponds, and mirrors will cause your character to lose sanity because he wants to become visible, and looking at the emptiness in the reflection makes him even more mad.
Best game ever!
Stage 1 (Nothing): The moment the main character realizes he has turned invisible.
Stage 2 (Suffer): The Invisible Man experiencing pain from the invisibility chemicals.
Stage 3 (Violence): He descends into madness and inflicts suffering upon others.