The Blackout Add-on for Project Winter has 9 achievements worth 195 gamerscore.
Win a round with the survivors as the Yeti
Win a round with the traitors as the Yeti
Get ambushed by wolves in bunkers twice in one game
Convert 3 survivors in a single round as the Demon
Convert 3 survivors in a single round as the Whisperer
Successfully convert a survivor during the Blackout event
Be the only survivor alive at the end of a round that has not been converted
Kill 3 wolves with your bare hands in a single game
Use a Rosary to protect against a conversion