Upgrade a building in the Stronghold.

Find the 8 statuettes in Monteriggioni.

Sprint for 100 meters.

Unlock a piece of Subject 16's video.

Complete DNA Sequence 1.

Defend a woman's honor.

Gold medal all Co-Ops missions.

Perform a Leap of Faith from the Top of Florence's Giotto's Campanile.

Break out of Abstergo.

Complete "Desperate Escape" with an S rank.

Defeat 150 enemies singlehandedly in one playthrough of "Desperate Escape."

Build up a certain level of trust with your partner.

Defeat a Majini with a headshot while it's jumping.