Team Fortress 2 is ringing in the holidays in its own inimitable fashion: with robots and weaponry. The "Mecha Update" introduces a Mecha-Engineer to the Mann vs Machine mode, a new MvM map, and three new weapons.

The update includes a "Big Rock" map illustrates why the Mecha-Engie is such a deadly adversary. It's a big map that gives the robot horde a much larger area to cover, but enemy teleporters will get them to you much faster. New tools for the job include the Rescue Ranger (Engineer), Loose Cannon (Demoman), and Vaccinator (Medic). Finally, the holiday season brings back last year's "Naughty" and "Nice" crates, full of yule-tide weapons and winter-themed items, respectively. They'll be available until January 3.