Under the Thorns

I made a walkthrough myself after finishing the game. There are 4 bad endings and 1 normal end and 1 true end.

Ending 1 - Unearned Trust

Choose : Trust Olivia

Ending 2 - Curiosity Killed the Cat

Choose : Flee immediately

Ending 3 - Because I Loved You

Choose : Accept Edward's pleas

Ending 4 - The Buried Truth

Choose : Olivia (when prompted about who to ask about the curse)

Normal end - The Eternal Nest

Choose : Inform Edward first

True ending - The First Step of a Journey

Choose : Stop the ritual first

The other options just vary in dialogue. They offer no significant ending.