Kill all 5 Warchiefs before any uruk take their place.

Collect 50% of the Ithildin.

Use Strike From Above while at least 60 feet above your target.

Destroy the Monument Gate and topple the statue of Sauron.

Eliminate the bodyguards of two Warchiefs, then draw them out and kill them.

Collect 25% of the Artifacts.

Attract caragors with bait 5 times.

Make 20 uruks flee by dropping Morgai Fly nests.

Free 5 caragors from cages.

Complete an Outcast Rescue Mission.

Successfully complete a Survivalist Challenge.

Ride the Subway 5 times