Complete all Survivalist Challenges.

After an uruk kills you to become a Captain, help him become a Warchief, then kill him.

Issue a Death Threat, and then successfully kill the target.

Kill The Tower.

Save Lithariel's life.

Complete all Acharn Legend Missions.

Complete all Outcast Rescue Missions.

Kill the Great White Graug.

Start a Riot by commanding a Warchief to attack another Warchief.

Collect 50% of the Ithildin.

Activate all Forge Towers.

Collect 25% of the Artifacts.

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