Full list of all 12 Heroes Trials achievements worth 1,000 gamerscore. It takes around 0-1 hour to unlock all of the achievements on Xbox One.
Achievements they've won
Achievements they've not won
Acquired the three magic spells.
Cleared Plonida shrine.
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.
Killed an enemy.
Talk to a NPC.