Here is the full list of all 15 Ashbourne achievements.
Travel by boat to Severia.
Use Ashbourne's in-game 'Camera Mode'
Kill 5 enemies.
Buy or sell an item to a merchant.
Regenerate by resting.
Rest for 24 hours.
Kill an enemy with a sword.
Mount a horse.
Reach Level 1.
Kill an enemy with a bow.
Begin the story of Ashbourne.
Reach Level 10.
Reach Level 30.
Win a game of Alea.
Win a 500 noble Alea wager.