Here is the full list of all 16 Lithium Inmate 39 Relapsed Edition achievements.
Cross the first blades in the game alive.
Kill your first nurse.
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.
Kill the Paranoia Boss.
Kill the Schizophrenia Boss.
Kill the Obsessive Boss.
Kill the Psychopathy Boss.
Kill the Humanoide.
Lithium Complete the game.
Complete the game without dying while wearing the hat.