Melee 5 enemies in a row.

Kick a Guard while using the Flying Machine.

Intercept a Borgia Courrier.

Upgrade a building in the Stronghold.

In Green Run, acquire your Tombstone.

Knock an opponent through a transition

Use your wingsuit to reach the Southern island.

Survive the encounter with Vaas and escape.

Kill an enemy with a takedown from above from a glider, zipline or parachute (Single Player only).

Craft 5 upgrades for your equipment.

Liberate an outpost without triggering an alarm.

Rescue Oliver from the pirates.