Achievements or trophies mark specific accomplishments made during all playthroughs of Dragon Age II. These include finishing plot-related activities, making specific choices at certain key points in the game, crafting choices, and performing certain tasks and meeting certain individuals. Each milestone also awards the player a certain number of points.
These secret achievements are not initially visible.[1]
Stone Cold Defeated the rock wraith on your expedition into the Deep Roads
King of the Hill Defeated the Arishok
Conqueror Defeated Meredith, knight-commander of Kirkwall's templars
Arcane Defender Sided with the mages five times
Mage Hunter Sided with the templars five times
The Exiled Prince
Achievements which can be obtained from The Exiled Prince. These achievements can be earned on any difficulty setting (confirmed PC). If the Achievements aren't unlocking, BioWare suggests you delete the DLC and reinstall it.
Avenged Confront the culprit behind the Vael family's murder.
Cloak and Dagger Meet secretly with the agent of the Divine.
Loyalty of the Prince Earn either a friendship or rivalry with Sebastian.
Memento Give Sebastian a family heirloom.
Retribution Dealt with the mercenaries that killed the Vael family.