Here is the full list of all 34 Erica (EU) trophies - there are 12 bronze, 18 silver, 3 gold and 1 platinum.
Accept the butterfly mask and become priestess.
Find Erica's favorite photo of Alodie and prove you're magic, and finish.
Do the rounds with Kirstie, and finish.
Save Tobi's life, and finish.
Sign Kirstie's card, and finish.
Try Blake's patience at the front desk, and finish.
Escape Steinbeck's office without getting caught, and finish.
Unlock all bronze, silver and gold trophies.
Wipe a tear from Tobi's cheek, and finish.
Tell Lucien to get out of Erica's room, and finish.
Slap Tobi, and finish.
Find the Chief Inspector with his most prized possession, and finish.
Find Akal Johar's ledger and a key to the code within, and finish.
Receive a note from the Chief Inspector, and finish.
Find the Delphic Epsilon slide in Ballard's lab, and finish.
Calm Kirstie when Hannah bleeds over the piano, and finish.
Hang out in the attic with Tobi, and finish.
Make perfume with Hannah, and finish.
Kiss Blake... then injure him, and finish.
Annoy Tobi, Kirstie, and Hannah, and finish.
Burn down Delphi House and leave alone.
Burn down Delphi house and leave with friends.
Join Lucien at Delphi House.
Stay at Delphi House after being sedated.
Play through without killing anyone, and finish.
Kill everyone in one playthrough, and finish.
Find all of the corpses in the game, and finish.
See the fox four times, and finish.
Spy on people whenever possible, and finish.
Find all of the hidden documents, and finish.
Disobey Blake at every turn, and finish.
See all major endings.
Find all of the oleander petals, and finish.
Find all of the Delphic Epsilon locks, and finish.