Full list of all 13 Viscera Cleanup Detail: Santa's Rampage achievements. It takes around 4-5 hours to unlock all of the achievements on Windows.
Collect Santa's shotgun in your Janitor's Trunk
Collect the different Rooks Keep figurines in your Janitor's Trunk
Collect the different Ballistic Weapons toys in your Janitor's Trunk
Build a stack of 10 stools
Collect the iconic reindeer nose in your Janitor's Trunk
Collect elf heads in your Janitor's Trunk, you freakin' psycho!
Incinerate 50 Santa hats, the symbol of everything you hate
Prove your incompetence by leaving a worse mess and clock off
Completely clean all mess and destroy every Christmas item in Santa's Workshop and clock off
Bring about the sad meeting of Funk Ninja to fire
Completely clean all mess in Santa's Workshop and clock off
Completely clean Santa's Workshop without breaking any Christmas items and clock off
Requisition a new replacement janitor through the use of TNT