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