Here is the full list of all 18 Beckett achievements.
Someone dies
Warm bath
Cold shower
Do you exist?
Death in the family
What's done is done
The mind loses focus
Someone lives
They were right
Fine dining for all the family
Remember what was
Live, die, repeat
Hands up if you're sane
Amy loved Beckett
The truth about the boy
Orders from The City
Homeless Issues
Absurdity of existence