The Ragnarök Add-on for Titan Quest Anniversary Edition has 12 achievements.
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
Have 10 enemies immobilized at the same time
Find Andvari's lost treasure
Have ten different class characters of at least level ten