Here is the full list of all 16 Krampus Kills achievements.
Collect 10 Snow Globes.
Find the SMG in the main game.
Get to the basement of the house.
Krampus kills you with his neck break attack.
Enter the great maze of Krampus.
The shadow of Santa has been defeated!
Beat the game.
Beat the game on Hard.
Beat the game on Hard and get a S rank.
In survival mode, make it to 15 minutes on any difficulty.
Use the super shotgun.
Pass through Oakville Cemetery.
Pass through Oakville Hospital.
Destroy the demon Gatekeeper that guards the entrance to the underworld.
Win a round in the Hide and Seek mini game.