The Lullaby for the Dark Add-on for Dead by Daylight has 4 achievements worth 100 gamerscore.
In public matches, throw 1000 Hatchets.
In public matches, down survivors 20 times with The Huntress' Hatchets further than 24 meters.
In a public match, achieve a merciless victory with The Huntress using only her 3 unique perks.
In a public match, escape with David using only his 3 unique perks.