The The Stars Are Left Add-on for Magicka has 7 achievements.
Vanquish 1000 creatures of the Cthulhu mytos.
Complete Chapter 3 in one sitting without dying.
Put great Cthulhu to sleep once more.
Complete Chapter 2 in one sitting without dying.
Complete Chapter 1 in one sitting without dying.
Get sucked into the portal to R'lyeh
Defeat Parker.