The Ragnarök Add-on for Titan Quest Anniversary Edition has 12 achievements.
Have 10 enemies immobilized at the same time
Have ten different class characters of at least level ten
Finish the main storyline
Improve a legendary item
Find new friends
Open the ancient gate
Acquire the mistletoe
Journey north of the Alps
Beat Legendary difficulty as a Rune Mastery character
Find Andvari's lost treasure