Rescue Jacob from the gulag

Stealth kill an enemy while they are having a conversation

Survive the avalanche

Translate a Monolith

You hung Ritchie Doucet from a Ferris wheel

Completely weakened a racket by killing all of its Enforcers

You collected your things from Sammy's

Complete the "Kovik's Sin" quest.

You completed the game

You used a rat tunnel

You assassinated 10 unaware enemies

You brought about the Lord Regent's fall from grace by broadcasting his crimes