Here is the full list of all 17 Thy Sword (EU) trophies - there are 4 bronze, 2 silver, 10 gold and 1 platinum.
Get all other trophies.
Finish the game.
Gain all five crystals.
Kill the Sorcerer of Thorn.
Kill the Dragon Lord.
Kill the Lich King & Queen.
Kill the Lurking Horror.
Chop 15 heads enemies in one game.
Find the secret gate to the loot room.
Kill the Spider Queen.
Headchop an enemy.
Kill a flying enemy with an arrow.
Get the key to a chest.
Get killed by an explosive barrel.
Finish the tutorial.
Get hit by your own arrow.
Hit the lantern on the title screen