Here is the full list of all 22 Iris.Fall achievements.
Clear the game
Observe the girl's front projection at the wheel.
Be blocked by different puppets in the shadow world.
Find the hidden drawings behind the screen.
Complete Chapter 7
Place the music note more than once in the Book World.
Flip the pages more than 10 times in the Book World.
Complete Chapter 6
Solve the huge book projection puzzle in the Library without removing any items from the wheel.
Solve the typewriter puzzle in the Library on the first try.
Complete Chapter 5
Rotate the cube just 3 times to complete the cube puzzle on the first floor.
Chase after the resting cat 3 times in the Hall of Many-Doors.
Complete Chapter 4
Cover the eyes in the right order without making any mistakes.
Complete Chapter 3
Knock over the bucket by the fireplace.
Did not reset the clock hands.
Complete Chapter 2
Complete the puzzle without making any circuit mistakes.
Complete Chapter 1
Pick up an item in the shadow world.