Kill your first nurse.
Cross the first blades in the game alive.
Get all the Bronze, Silver and Gold trophies.
Kill the Paranoia Boss.
Kill the Schizophrenia Boss.
Kill the Obsessive Boss.
Kill the Psychopathy Boss.
Kill the Humanoide.
Complete the game
Complete the game without dying while wearing the hat.
Kill your first dog.
Kill your first crocodile.
Kill your first spider.
Kill your first rat.
Read all the traumatic messages.
Kill the Bipolar Boss.
Kill the Depression Boss.