Here is the full list of all 19 The Choice of Life: Middle Ages achievements.
Reborn 30 times
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Read the first and second volumes of the book "The Victory of Good"
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Check the friendship of two friends
Get rid of the Demon forever
Defeat the mercenary
Defeat the Bandit Leader
Destroy the kingdom
Enter the city through sewers
Prevent a fire in the scriptorium
Reborn 10 times
Help the Prince to imprison the Demon
Complete the trial of the treasury keeper
Cheer the King
Enter the city through the main gate
Complete the blacksmith's challenge
Get the title for the first time
Make a deal with the spirit