Here is the full list of all 11 Interfectorem trophies - there are 5 bronze, 5 silver and 1 gold.
Begin the second act
Toss an eclair at someone that deserves it
Begin the first act
Beat the game
Find Alis' water bottle
Lose in battle to the Wood Nymph
Find a journal you shouldn't read!
Um, talk to the witch?
Begin the third act
Begin the fourth act
Begin the fifth act