Here is the full list of all 18 Interactive Horror Stories achievements.
You summoned something and it killed your child
You summoned something and you need to exorcise it
Don't buy the board
Be free
Killing yourself with the sword of Alexander the Great
Killing yourself by jumping from the window
Become a clown
Don't buy the skull
Start of a new life
...
A lame ending
The king is dead, long live the KING!
Learn what happened to other babies
Resurrect "Jonathan"
Get killed by Lisa
Be a good mom to Lisa