The Invasion Add-on for Call of Duty: Ghosts (Xbox 360) has 10 achievements worth 250 gamerscore.
Get past the first gate in Awakening in Regular or Hardcore difficulty.
Extend the bridge in Awakening in Regular or Hardcore difficulty.
Escape Awakening for the first time in Regular or Hardcore difficulty.
Escape Awakening using two Relics in Regular or Hardcore difficulty.
Complete all Challenges and escape Awakening in Regular or Hardcore difficulty.
Find all of the Intel in Awakening.
Kill a Gargoyle with the Vanguard in Awakening in Regular or Hardcore difficulty.
Complete the Egg-Stra XP challenge and then scan an obelisk in the Invasion DLC package.
Kill 5 cryptids with the Ark attached to every compatible weapon in Awakening in Regular\Hardcore.
Escape Awakening with each of the four classes in Regular or Hardcore difficulty.