Here is the full list of all 28 Ivanoile Christalixeur Corruption achievements.
Stay in game for 2 hours
Stay in game for 30 min
Stay in game for 1 hour
During eps 1, lost the fight with the stranger
During eps 2, fail the attack with Ivanoile
During eps 2, fail the QTE with Ivanoile
Go back to the orphenage during eps 4
During eps 1, win the fight with the stranger with their Corruption at 100%
During eps 2, fail the Hide event with Haley
A choice in episode 2
A bonus achievement, cool?
Complete eps 5 with another ending / Ivanoile
During eps 4, fail the Dodge event with Haley
During eps 3, fail the QTE with Iliana
Read the bonus story
Complete eps 5 with an ending / Haley
Complete episode 4
Complete episode 3
Complete episode 2
During eps 2, Haley must go back to Ivanoile
Complete episode 1
During eps 1, win the fight with the stranger
During eps 1, fail the Dodge event with Haley
During eps 1, fail the QTE with Haley
Start the story
Check up the music room