Dragon Age II has several main quests which have to be completed in order to complete the game.
Prologue 
Edit
The Destruction of Lothering
Act 1 Edit
A Business Discussion
Act of Mercy
A Friend in the Guard
A New Home?
Blackpowder Promise
Enemies Among Us
Friends in Low Places
Long Way Home
Shepherding Wolves
The Deep Roads Expedition
Tranquility
Wayward Son
Act 2 Edit
All That Remains
Blackpowder Courtesy
Demands of the Qun
Finding Home
Following the Qun
Offered and Lost
Prime Suspect
Profit and Loss
To Catch a Thief
Act 3 Edit
Best Served Cold
On the Loose
Showdown
The Last Straw
