Here is the full list of all 21 The Shattering achievements.
Back to reality
Game Completed
The loop continues
Put together the statue
Act 4 Completed
Keep the cold out
Ate the pizza
Act 3 Completed
Made it to the interview on the first try
Broke in and found the files
Act 2 Completed
Grabbed every toothbrush
Smartest kid in the class
Approached all the children at playtime
Discovered the balloon's secret
Collected all 9 drawings
Act 1 Completed
Cracked the safe code
Found the scissors
Found the torn photo piece
Liar liar pants on fire