Here is the full list of all 50 Seduce Me 2: The Demon War achievements.
Learn of Saero and Ezaeur's Fate
Share Diana's Love with Saero
Keep Ezaeur Forever
Become Baptized by Saero
Begin Diana's Story
Give Your Life For Damien's
Watch Your Love Burn
Have him a Demon Forever
Live a Human Life with Damien
Sergeant Refuses to Rule
Go Through the Brute's Test
Begin Damien's Story
Experience The Story For the First Time
Die At The Hands of the Spirit
Become Victim of Revenge
Experience Erik's Eternal Devotion
Begin Erik's Story
Put Trust in a Killer
Witness The Last One Standing
Welcome New Joy with Matthew
Help True Love Prevail for Saero and Ezaeur
Let Saero Search for the Rose
Begin Matthew's Story
Be Sentenced by an Angel
Lose your Trainer
Obtain an Angel's Forgiveness
Shadow Rules the Demon World
Betray the Rebel Queen
Defy Destiny with James
Diana Rules the Demon World
Learn Shadow's Secret
Use Blood Magic against the Demon Lord
Begin James's Story
Fail The Dragon's Test
Perish Centimeters From Your Love
Return Home with Sam
The Four Rebel Leaders Work Together
Rule The Demon World with Aomaris
Become Queen of the Demon World
A Gift From Hell
Trap the Demon Lord Without Bloodshed
Begin Sam's Story
Experience More of This Story
Meet K, your guide!
Become Lost in Destiny
Mourn The Death of the Rebel Queen
Rabbit Rules the Demon World
Fae Rules the Demon World
Get Away from the War with Fae
Witness Inequality