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