Here is the full list of all 16 LEAVES - there are The Journey achievements.
Waited for the poison to wear off
Set the masks correctly
Opened 3 doors in Eggtown
Used the Travelstone 3 times
Found 5 inhabitants
Shooed away the armadillo 3 times
Set the clock
Opened the portal
Vanquished the monster
Found the magnifier
Upset the Treefruities
Didn't need any help
Found 10 inhabitants
Found 15 inhabitants
Played the game without interruption
Opened the Heaven's Gate