The The Deeds of Captain Wilkins Add-on for Wolfenstein II: The New Colossus has 10 achievements worth 180 gamerscore.
Return to America
Destroy the cannons of Kodiak Island
Stop the Sun Gun
Find all readables in "The Deeds of Captain Wilkins"
Find all gold in "The Deeds of Captain Wilkins"
Beat "The Deeds of Captain Wilkins" on "I am Death Incarnate" difficulty or higher
Beat "The Deeds of Captain Wilkins" on "Mein leben" difficulty
Beat the Anchorage challenge on "I am Death Incarnate" difficulty
Beat the Kodiak Islands challenge on "I am Death Incarnate" difficulty
Beat the Submerged challenge on "I am Death Incarnate" difficulty