Achievements are available to both the host and players who join a multiplayer game. Other than the 3 multiplayer achievements, all achievements can be unlocked during multi- or single-player sessions.[1]
As of v1.092, there is a Developer Console command that can be used in case an achievement should unlock but does not: "RetryAchievementUnlocks".
Turn off the Big Banger while it's playing loudly in zero-gravity during a Solo game
The game's master volume (in options) affects the Big Banger's shaking[2]. If the achievement does not seem to unlock, try setting both the radio and the master volume to max. To negate some of the shaking, the radio can be "jammed" into corners or under parts of machines, such as the Slosh-O-Matic.
Walking over blood and other messes causes the player to track footprints for a short time. The amount of footprints made varies depending on the size of the mess that was stepped into.
Transfer a Goo-Jar to another work-site and infect something
Players can transfer items to other levels via the Janitor's Trunk. Smash the Alien Virus Canister on any body or static object in a level to "infect" it.
Any casing is counted for this, even if it has been previously picked up. This means the player can theoretically pick up and drop the same casing 800 times.
Throw the Bad Banger into the Woodchipper, portal, or cabin fireplace. The radio can also be destroyed with tools like the Laser Welder, which can be brought via the Janitor's Trunk.
Collect the chainsaw, boomstick, cursed hand and the evil book and return them to your office
The gun and hand are in the cabin (the hand is behind a crate on the bookshelf), the chainsaw is in the cabin cellar, and the book is on the underground altar.
Santa's Rampage Achievements
Note that these achievements must be earned separately for the standalone and integrated versions of this level.
Prove your incompetence by leaving a worse mess and clock off
Cover part of the level in blood using a dirty mop or by dropping viscera, then punch out. "Painting" a full wall or two should be enough. This can be paired with "Thunder Candle", since the player's death makes a large mess.
Completely clean Santa's Workshop without breaking any Christmas items and clock off
Up to 3 Christmas items can be broken while still earning the achievement[4]. The only real "breakable" Christmas items in the level are the hanging ball ornaments. The glass bottles of whiskey are considered trash, so breaking/burning them is not penalized.
Completely clean all mess and destroy every Christmas item in Santa's Workshop and clock off
The "Christmas items" are: ball ornaments, candles, candy canes, present boxes, figurines, toy guns, and Santa hats[4]. To be safe, the player can simply burn everything in the level they can pick up (such as cloth dolls, stools, and lanterns).
Trivia: The Ice-Cold Banger was formerly known as "The Funk Ninja", with a different icon and the description "Bring about the sad meeting of Funk Ninja to fire".
Incinerate 50 Santa hats, the symbol of everything you hate
There are 6 hats in total. As a "shortcut", one can gather all 6 hats, save, burn the hats, clock out, reload the save, and repeat until the counter hits 50. It is not 100% reliable however, due to lag in Steam's progress syncing. When the player dies, a hat is included in the resulting viscera.
Stools must be stacked one on top of another in a straight line. "Pyramid" style towers will not count. Stools can be easily stacked from the top of the balcony.
As of v1.092, the player does not need to clean the level to earn this achievement if launching the integrated version. Players launching the standalone version will need to clean the level to unlock this achievement.
Note that punching out without cleaning the level will cause the player to get fired, and the office will be cleared of all trophies and collectibles.
