Full list of all 9 Refund Me If You Can achievements.
The base game contains 5 achievements, and there are 2 DLC packs containing 4 achievements.
Escape the nightmare in less then two hours
You found the secret art
You found the blue light
You found the camp fire
You find yourself
You found your computer
You found the secret path
You activated the hidden bridge
You found the blue pumpkin