The Psychosis Experiment is a feature exclusive to the Hallowed Nights event in Don't Starve Together. It can be conducted at the Mad Scientist Lab, using a Crow and Dark Petals, and depleting 10 for the player. The experiment has a 66% chance to result in a Dram of Psychic Fortitude and a 33% to result in a Tumblerful of Psychic Fortitude.
Both potions restore the players' Sanity both upon consumption and slowly over time. The Dram initially restores 5 upon consumption, while the Tumblerful restores 15 upon consumption. During the next minute, both potions restore 1 every two seconds, adding up to a additional restoration of 30. Both potions can also be used as Fire Fuel.
- The Mad Scientist Lab and all related craftable Items were introduced to the Hallowed Nights event in 2018.