The Far Harbor Add-on for Fallout 4 has 10 achievements.
Complete the quest "Close to Home"
Complete the quest "Cleansing the Land"
Complete the quest "The Way Life Should Be"
Collect all issues of "The Islander's Almanac" magazine
Complete the quest "Where You Belong"
Cook One of the New Far Harbor Recipes
Discover 20 Far Harbor Locations
Unlock 3 Far Harbor Workshop Locations
Complete the quest "Far From Home"
Defeat 30 Far Harbor Sea Creatures