Full list of all 12 Heroes Trials achievements worth 1,000 gamerscore. It takes around 1-2 hours to unlock all of the achievements on Xbox One.
Interacted with the Adel and Soreon statues.
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.
Cleared the first trial.
Defeated Potako.
Talk to a NPC.
Killed an enemy.