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