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.
Found and killed the ancient demon, Hybris.
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.
Completely upgraded the armor of one of your party members.
Found all four chapters of "The History of the Chantry," by Brother Genitivi.
Found and killed the undying Xebenkeck.
Completed a full year in Kirkwall without any party member being knocked unconscious.
Found and killed a high dragon.
Sided with the templars five times.
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.
Reached Level 20.
Completed a romance with one of your party members.
Visited 10 caves in Kirkwall and the surrounding area.
Mastered a weapon style.
Earned the friendship or rivalry of four party members.
Earned the rivalry of one of your party members.
Reached Kirkwall with each character class across multiple playthroughs.
Sided with the mages five times.
Defeated the Arishok.
Met Grand Cleric Elthina, Viscount Dumar, Knight-Commander Meredith, and First Enchanter Orsino.
Earned the Arishok's respect.
Found and killed a varterral.
Learned two class specializations.
Flirted with one of your party members to begin a romance.
Had 100 or more sovereigns in your purse.
Used teamwork to perform a cross-class combo.
Defeated the rock wraith on your expedition into the Deep Roads.
Unlocked 100 codex entries.
Explored the Deep Roads.
Reached Level 10.
Became a partner in a Deep Roads expedition.
Earned the friendship of one of your party members.
Allied yourself with the mercenaries upon arriving in Kirkwall.
Enchanted an item.
Opened 50 chests.
Recruited four party members.
Upgraded a spell or talent.
Left Kirkwall to explore the outlying regions.
Gave a gift to one of your party members.
Kicked the slavers out of your ancestral mansion.
Upgraded the armor of one of your party members.
Toggled the map from day to night.
Acquired your first crafting recipe.
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.
Earned either a friendship or rivalry with Sebastian.
Met secretly with the agent of the Divine
Gave Sebastian a family heirloom.
Confronted the culprit behind the Vael family's murder.
Dealt with the mercenaries that killed the Vael family.
Completed every side quest in the Vimmark Mountains prison tower.
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.
Killed a genlock, genlock alpha, hurlock alpha, bronto, and deepstalker in the Vimmark Mountains.
Evaded vault security in Chateau Haine.
Disarmed the fire traps in Chateau Haine's vaults.
Lured and killed an alpha wyvern near Chateau Haine.
Defeated Duke Prosper, with or without Tallis.
Tallis joined the party.