Here is the full list of all 11 Dark Quest 2 trophies - there are 6 bronze, 4 silver and 1 gold.
Kill your first monster
Unlock the archer
Unlock the dark monk
Unlock the dwarf
Unlock the knight
Unlock the wizard
Slay the executioner
Find the 3 pieces of the talisman
Defeat the evil sorcerer
Defeat the evil sorcerer in hardcore mode
Complete all the quests