Kill The Black Hand.

Kill the Great White Graug.

Complete a Sword Mission and begin growing the legend of Urfael.

Activate all Forge Towers.

Brand all 5 Warchiefs.

Kill The Hammer.

Witness the creation of The Rings of Power.

Destroy the Monument Gate and topple the statue of Sauron.

Complete a Dagger Mission and begin growing the legend of Acharn.

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

Attract caragors with bait 5 times.

Get Ratbag promoted to Warchief.

Use the Detonate ability to burn 50 uruks.