The Rise of Iron Add-on for Destiny has 9 achievements worth 250 gamerscore.
Activate all Iron Lord Artifacts.
Complete the "Wrath of the Machine" raid.
Complete the "Glory and the Taking of It" quest.
Complete the "Kovik's Sin" quest.
Complete an encounter in the Archon's Forge.
Complete the "Rise of Iron" quest.
Complete the "King of the Mountain" mission.
Play the Rise of Iron theme on the bells in the Iron Temple.
Complete the "Wrath of the Machine" raid on heroic difficulty.