Here is the full list of all 31 Dungeon Travelers 2: The Royal Library and The Monster Seal trophies - 15 bronze, 10 silver, 5 gold and 1 platinum.
Acquire all trophies.
Defeat 20,000 monsters.
Defeat 5,000 monsters.
Defeat the Demon God.
Unlock the Royal Library Depths.
Activate a party skill.
Unlock the Underground Waterway.
Unlock the Marsala Onsen.
Acquire 100,000 gold.
Unlock the Rousset Imperial Villa.
Unlock the Giant Tree of Tver.
Level up to an advanced class.
Unlock the Khorramshahr Village.
Enchant a piece of equipment to max rank at the Blacksmith Shop.
Enchant a piece of equipment at the Blacksmith Shop.
Unlock the Mostar Catacombs.
Defeat 1,000 monsters.
Reach client level 3 at the Quest Desk.
Defeat 500 monsters.
Unlock the Samara Passage.
Unlock the Tower of Piertan.
Acquire 10,000 gold.
Level up to an intermediate class.
Complete a quest.
Eat at the Ice Cream Shop.
Unlock the Temple of Wrappl.
Eat at the Ramen Shop.
Defeat 100 monsters.
Create a Grand Sealbook.
Use a joint skill.
Create a Sealbook.