You killed 4 enemies in less than 1 second using the crossbow

You completed all the Slackjaw side missions

You collected all the Sokolov paintings

You killed characters with each weapon and offensive gadget

You assassinated the Lord Regent, Hiram Burrows

You made others kill 5 of their own allies

You pickpocketed items worth a total of 200 coins

You killed an enemy with the Wall of Light

You got the Art Dealer's safe combination for Slackjaw, but robbed the safe first

After Coldridge Prison, you eluded 5 pursuers at once without killing them or leaving the map

You fought 5 enemies at once and none of them survived

You assassinated 10 unaware enemies