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