Here is the full list of all 24 Unknown Fate achievements.
Alwasy good to know when to stop.
Find all memories.
Complete the adventure.
Kill all enemies.
Stop!
You found the last piece!
Memories are all important.
Kill the boss without dying.
Goodbye colleague.
All-purpose solution.
You have the full power of the artefact now.
That saved me.
Weird things in the park.
Together is better.
Did you see it?
I'll take care of it.
When we met again.
I'm glad I found you.
Sometimes you need some help.
Me, the hands and the Wardrobe.
I'm not having fun.
Sometimes you are not alone.
Some Unfortunate Events!
When we first met.