Here is the full list of all 10 The Lovebirds achievements.
You started the game...
You tried to skip the cutscene of James talking to the mystery person...
You chose Demons over Angels...
You chose Angels over Demons...
You went to the forest after Olivia's... Smokin' hot accident...
You watched me burn her...
You watched the whole credits and saw more than those who didn't...
You made pretty good choices... You got The Asylum Ending...
You clicked James when you got The Slashes Ending...
You just broke my heart... You got The Last Death Ending...