The How the Saints Save Christmas Add-on for Saints Row IV has 10 achievements worth 100 gamerscore.
Complete all instances of Naughty and Nice.
Complete all instances of Genki Holiday.
Complete the holiday text adventure.
Deliver a present to Zinyak in 'The Santa Clawz'.
Find all the snowmen vignettes in the North Pole.
Ring all the bells in town in 'Miracle on 3rd Street'.
Find the present in a holiday mission.
Complete all three missions.
Find all the letters to Santa in the holiday missions.
Lick the candy cane barricade all the way through in 'The Fight Before Christmas'.