Here is the full list of all 50 Seduce Me 2: The Demon War achievements.
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
Let Saero Search for the Rose
Trap the Demon Lord Without Bloodshed
Begin Sam's Story
Experience More of This Story
Meet K, your guide!
Begin James's Story
Begin Erik's Story
Begin Matthew's Story
Begin Damien's Story
Begin Diana's Story
Become Lost in Destiny
Become Victim of Revenge
Witness The Last One Standing
Have him a Demon Forever
Defy Destiny with James
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
Diana Rules the Demon World
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
Get Away from the War with Fae
Witness Inequality
Learn of Saero and Ezaeur's Fate
Obtain an Angel's Forgiveness
Be Sentenced by an Angel
Die At The Hands of the Spirit
Put Trust in a Killer
Give Your Life For Damien's
Watch Your Love Burn
Use Blood Magic against the Demon Lord
Lose your Trainer
Experience The Story For the First Time