Here is the full list of all 17 THE NORMAL THING achievements.
Use the nipper to open both shortcut doors.
Never caught by the Unknown.
Get ending within an hour.
Clear Parrot's mission.
Caught more than 10 times by the Unknown.
Get the true ending.
Clear Turtle's mission.
Get the normal ending.
Talk to every flowers.
Put the correct answer as x=y symmetric.
Conduct all events inside the lake.
Decline the parrot request three times.
Match the Henry puzzle.
Match the puzzle without using parrot feathers.
Answering the correct answer at once on altars.
Escape after 4 times moving from the maze.
Check the number before escaping the house.