Here is the full list of all 18 Lily's Night Off achievements.
See ending 1 in the game
See ending 2 in the game
See ending 3 in the game
See ending 4 in the game
See ending 5 in the game
See ending 6 in the game
See ending 7 in the game
See ending 8 in the game
See ending 9 in the game
See ending 10 in the game
See ending 11 in the game
See ending 12 in the game
See ending 13 in the game
See ending 14 in the game
See ending 15 in the game
See ending 16 in the game
See the true ending in the game
See the secret true ending in the game