You defeated Capon during practice. Again.

Equip legendary gear in all slots

Perform a leap of faith as Yasuke

Complete Act 1 of the main story

Adopt a pet

Fully upgrade a building in the Hideout

Perform a landing roll

Perform a leap of faith from a grappling hook swing

Stay airborne by swinging from one grappling hook point to another

Sheath your weapon immediately after an enemy dies from Bleed

Unlock the Hideout

Perform 5 assassinations in a row without being noticed or entering combat