Here is the full list of all 13 Heroes Trials (EU) trophies - there are 1 silver, 11 gold and 1 platinum.
Obtained all trophies.
Acquired the three magic spells.
Cleared Plonida shrine.
Defeated Denmaku.
Defeated Taurus.
Get the bombs.
Buy the boots.
Found a fruit or vegetable in the island.
Interacted with the Adel and Soreon statues.
Cleared the first trial.
Defeated Potako.
Killed an enemy.
Talk to a NPC.