Here is the full list of all 97 Slay the Princess achievements.
Have a voice ruin your happy ending
Strike the heart from the belly of the beast
Lure an enemy to advantageous terrain and win
Directly attack a suspicious character
Successfully flee from a creature in its den
Dodge a creature until you can dodge no longer
Share a thorny prison
Fight your foe unarmed and go the distance
Bring the Beast to Her
Free a creature while under extreme duress
Fall for the rest of your life
Slay your better
Whatever it is, you'll face it together.
Beget Strange Endings
Bring the Eye of the Needle to Her
Free someone who doesn't want to be freed
Bring the Drowned Grey to Her
Drown at the hands of a faded spirit.
Dispatch a prisoner
It was in her nature
Take on a spirit and destroy it the only way you can.
Slay the Princess, and make some enemies along the way
Bring the Deconstructed Damsel to Her
It's all she wanted
Bring the Witch to Her
It was in your nature
Bring the Spectre to Her
Pick up a passenger and take her to her destination
Cannot die cannot die cannot die
Bring the Tower to Her
Pledge your loyalty to your better.
Bring the Adversary to Her
Take the bait from your foe
Bring the Den to Her
Successfully take the fight to a creature in its den
Work through some issues and learn to trust again.
Kiss her
Bring the Burned Grey to Her
Burn at the hands of a faded spirit
Slay an innocent
Slay the Princess
Bring the Thorn to Her
Run out of questions
Abandon her in a thorny prison
Hand your power to a suspicious character.
When taken against your will, deal with your enemy the only way you can.
There's no going back now
Bring the Apotheosis to Her
Witness your better's ascension
Bring the Moment of Clarity to Her
See what hides behind her mask
Fool a predator by faking your own death
And at the end of that path is a cabin
Bring the Wounded Wild to Her
Break the mirror without asking any questions.
Some tears can never be mended
Leave a suspicious character in the basement
Bring the Prisoner to Her
Become your own jailer
Bring the Wraith to Her
When taken against your will, witness your enemy's freedom
Stuck in a dream without a stair to be seen
Bring the Razor's heart to Her
Allow a sharp foe to vanquish herself
So have you become nothing once again
This is it
You don't know what you're doing
What can I do to make you stop?
Bring the Razor (Full) to Her
Master yourself and vanquish a sharp foe.
Finish the Game. (The Good Ending doesn't count)
Only new beginnings
We Carve Meaning
Bring the Prisoner's head to Her
All of this is you
Free a prisoner
Bring the Fury to Her
You've unraveled
Unleash the power of pacifism on your foe
Bring the Networked Wild to Her
You've withered
Embrace your transformation
Freeze in front of a creature on your first meeting
Bring the Nightmare to Her
You've grown
Let your terrors loose upon the world
Why have you come back?!
Bring the Damsel to Her
Attempt to Out-Wait Your Destiny.
Your love will set you free
Return to your destined path, or face the consequences
There are worse fates to suffer than a broken heart
You'll know it when you see it.
Bring the Stranger to Her
It's you
When everything is possible, nothing is.
You did it! You saved everyone!