Full list of all 51 Self-Delusion achievements.
The base game contains 30 achievements, and there is 1 DLC pack containing 21 achievements.
All the skeletons got their heads
Break 5 pumpkin lanterns
Break 15 pumpkin lanterns
Break 50 pumpkin lanterns
Give the ghost a treat
Break all pumpkin lanterns
Skeletons got their heads 5 times
Skeletons got their heads 20 times
Complete the event on hard difficulty
Don't be on time
Take part in the winter event
Get the winter ending
Collect all notes
Get caught by a monster
Win against Ancybal on hard
Drink a lot of coffee
Meet Lapot
Get a good special ending
Get a bad special ending
Complete Last Night on Hard Difficulty