The The Desolation of Mordor Story Expansion Add-on for Middle-earth: Shadow of War has 10 achievements worth 250 gamerscore.
Complete the Desolation of Mordor with a Gold Rating.
Conquer the Fortress of Shindrâm as Baranor.
Defend the Oasis.
Kill at least one enemy with each ammo type while gliding as Baranor.
Save Serka.
Leave your mark on the Overlord of Lithlad.
Change the landscape of Lithlad.
Collect all Númenórean artifacts and bring them to Torvin.
Achieve a Gold Rating on all Shadow of the Past missions in Lithlad.
Conquer the Fortress of Shindrâm as Talion.