Here is the full list of all 19 Calm Down Stalin - there are VR achievements.
Complete the pipe tutorial
Complete all tutorial levels
Unlock all absurd-bracket levels
Complete the "Calm Down, Stalin" level
Complete all base-bracket levels
Complete all challenge-bracket levels
Connect 2 phone calls together
Kill a spy with a book
Kill 7 flies with a gun without missing once
Achieve maximum drunkness
Eat a fly
Break 7 bottles with a gun without missing
Draw on an order before signing it
Shoot a phone off the base
Smoke for 10 minutes in total
Sign 50 documents
Kill 100 spies
Answer 30 phone calls
Drink 5 litres of vodka