Here is the full list of all 24 Tales Of Aravorn: An Elven Marriage achievements.
Unlock Lydia romance CG (playing as Elenor)
Unlock Lydia romance CG (playing as Saren)
Unlock Nathir romance CG (playing as Saren)
Unlock Myrth romance CG (playing as Saren)
Unlock Nathir romance CG (playing as Elenor)
Unlock Rei romance CG (playing as Elenor)
Unlock Lydia Pin-Up
Unlock Myrth Pin-Up
Unlock Nathir Pin-Up
Unlock Rei Pin-Up
Unlock Lydia Potion CG
Unlock Nathir Bet CG
Solve Aramas and Lamia conflict peacefully
trigger Lamia's sneak attack scene
trigger Lamia's warehouse scene
trigger King's ambush scene
trigger King's forest battle scene
trigger Battle Of the Gods scene
Reach level 20 with any character
Pick friendly choice 30 times
Pick forceful choice 30 times
Pick joking choice 30 times
Defeat optional Mushroom God boss
Complete Ellisar's sidequest