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.
Talk to a NPC.
Buy the boots.
Found a fruit or vegetable in the island.
Killed an enemy.
Cleared the first trial.
Defeated Potako.
Defeated Taurus.
Defeated Denmaku.
Get the bombs.
Acquired the three magic spells.
Interacted with the Adel and Soreon statues.
Cleared Plonida shrine.