Full list of all 65 Dragon Age II achievements worth 1,370 gamerscore. It takes around 60-80 hours to unlock all of the achievements in the base game.
The base game contains 50 achievements worth 1,000 Gamerscore, and there are 3 DLC packs containing 15 achievements worth 370 Gamerscore.
Became the viscount of Kirkwall.
Sided with the templars five times.
Found all four chapters of "The History of the Chantry," by Brother Genitivi.
Earned the Arishok's respect.
Found and killed the undying Xebenkeck.
Completed a full year in Kirkwall without any party member being knocked unconscious.
Became a partner in a Deep Roads expedition.
Earned the rivalry of one of your party members.
Reached Kirkwall with each character class across multiple playthroughs.
Allied yourself with the mercenaries upon arriving in Kirkwall.
Completed Dragon Age II twice, or completed it once with a save imported from Dragon Age Origins.
Completed Dragon Age II.
Defeated Meredith, knight-commander of Kirkwall's templars.
Completed a romance with one of your party members.
Crafted all of the items from a single crafting tree.
Found every variety of crafting resources.
During each year in Kirkwall, discovered 3 secret messages from the Band of Three.
Found and killed the ancient demon, Hybris.
Found and killed a high dragon.
Completely upgraded the armor of one of your party members.
Sided with the mages five times.
Defeated the Arishok.
Met Grand Cleric Elthina, Viscount Dumar, Knight-Commander Meredith, and First Enchanter Orsino.
Earned the friendship or rivalry of four party members.
Found and killed a varterral.
Visited 10 caves in Kirkwall and the surrounding area.
Flirted with one of your party members to begin a romance.
Defeated the rock wraith on your expedition into the Deep Roads.
Explored the Deep Roads.
Enchanted an item.
Recruited four party members.
Unlocked 100 codex entries.
Earned the friendship of one of your party members.
Gave a gift to one of your party members.
Kicked the slavers out of your ancestral mansion.
Opened 50 chests.
Used teamwork to perform a cross-class combo.
Left Kirkwall to explore the outlying regions.
Upgraded a spell or talent.
Mastered a weapon style.
Learned two class specializations.
Reached Level 20.
Had 100 or more sovereigns in your purse.
Reached Level 10.
Upgraded the armor of one of your party members.
Acquired your first crafting recipe.
Toggled the map from day to night.
Became a resident of Kirkwall.
Allied yourself with the smugglers upon arriving in Kirkwall.
Listened to Varric begin his tale of the Champion of Kirkwall.
Met secretly with the agent of the Divine
Earned either a friendship or rivalry with Sebastian.
Gave Sebastian a family heirloom.
Confronted the culprit behind the Vael family's murder.
Dealt with the mercenaries that killed the Vael family.
Completed the main quest in the Vimmark Mountains with Bethany or Carver in the party.
Defeated an ancient evil in the Vimmark Mountains.
Applied three effects to Hawke's Key.
Completed every side quest in the Vimmark Mountains prison tower.
Killed a genlock, genlock alpha, hurlock alpha, bronto, and deepstalker in the Vimmark Mountains.
Meet Tallis in Hightown.
Lure and kill an alpha wyvern near Chateau Haine.
Evade vault security in Chateau Haine.
Disarm the fire traps in Chateau Haine's vaults.
Defeat Duke Prosper, with or without Tallis.