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