Here is the full list of all 15 Grand Pigeon's Duty achievements.
Choose Cipher.
Pass really difficult level without mistakes.
Complete line of Cipher and his resistance.
Complete line of Irwin with positive consequences.
Defeat Irwin.
Let Irwin destroy the city.
Complete line of Irwin with negative consequences.
Make a mistake in the preparation of serum.
Choose Irwin.
Complete line of Klaus with positive consequences.
Save the Preacher's life.
Complete line of Klaus with negative consequences.
Revenge for the death of Klaus.
Choose Klaus.
Don't leave the game in the initial speech Cipher and join the resistance.