In Kirkwall in Dragon Age II, there are random group encounters of enemies in Docks, Hightown, and Lowtown at night during all three Acts who ambush Hawke and his/her companions. While some only appear in later Acts, it is possible for early gangs to appear all-throughout if you do not defeat them.
Act 1
- Carta - Docks
- Guard Pretenders - Hightown
- Redwater Teeth - Docks
- Sharps - Lowtown
- Swindlers
Act 2
- Invisible Sisters - Hightown
- Dog Lords - Lowtown
- Undercut Thrifters - Docks
Act 3
- Slave Hunters - Docks
- Followers of She - Lowtown
These groups are encountered during Sketchy on the Details:
- Antivan Assassins
- Denerim Avengers
- Qunari Death Squad
- Rivaini Legendary Beard