Originally Posted by rokkyrok
Spare or save Saskia.
I can confirm that this is NOT "story-related"
. I did both ways and when you choose to [KILL THE DRAGON]
you won't get this achievement.
You have to choose [WALK AWAY]
in order to get this achievement.
Still not sure about
Help Iorveth find the dagger needed to free Saskia from the spell that holds her.
I also played both ways here but only got the achievement when I helped Philippa
out of the prison and killed the Golem who guarded the chest with the dagger inside. It's only logical then that you will miss out on this achievement if you ignore her and if you go for Triss.