Here is the full list of all 28 STAY (EU) trophies - there are 8 bronze, 13 silver, 6 gold and 1 platinum.
Collect all the other trophies
Who are you, stranger?
And then there was light...
Don't leave during a time interval
Never kill the cat
A neverending book which is not for Bastian
A life within a life within a life within...
Guardians, feathers and the unknown
Board game solitaire
Hail to the Chief
Never leave the magic circle
Don't lose sight of the north
Bad hair day not allowed
Play it cool
Memories shaped into bits and pieces
Dance with the ugliest partner
Cracking the final code
Reach the final chapter with the highest emotional bonding
Reach the final chapter with the highest level of trust
End Quinn's journey with a feeling of Acceptance
End Quinn's journey with a feeling of Bargaining
End Quinn's journey with a feeling of Anger
Back to square one
To be continued...
End Quinn's journey with a feeling of Denial and Isolation
End Quinn's journey with a feeling of Depression
Become the perfect soulmate and never leave Quinn
Unveil all secret rooms