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