Here is the full list of all 35 Fenrir's Prelude achievements.
It was just a dream...
You learned how to play the game!
I never liked you anyways.
Something isn't right.
Barely toasted with jam.
What a good boy!
Sometimes things are better left unsaid.
You got the good ending!
Better luck next time!
You got the normal ending, try again for another!
You were able to save Fenrir!
You got the Perfect ending!
Time to make a new life.
You got the Fire Stone!
You got the Earth Stone!
You got the Wind Stone!
You got the Water Stone!
You got the Darkness Stone!
You got the Light Stone!
You got out the jail!
Acquired the Ragnablade.
She's the hottest around!
Met Erebus.
Welcome to Mimir's Hill.
The death of Discordia.
Acquired Chalice of Mind.
Somethings just never end.
Bathing in this water makes you forget everything.
You got the map of Midrealm.
Where am I?
Why am I here?
Killed Psyche.
This is where the fun starts.
You got to the Temple of Ascension!
You found Lost Atlantis!