Gather all "Letters of the Lost".

Craft a special syringe.

Gather all the memory cards.

Kill an enemy with a takedown from above from a glider, zipline or parachute.

Kill an enemy with the Repair Tool.

Attend the final ceremony.

Kill 4 enemies simultaneously with one explosion.

Kill 50 enemies with the flamethrower.

Use your wingsuit to reach the Southern island.

Survive the encounter with Vaas and escape.

Rescue Keith from Buck.

Craft 25 syringes.