A sudden Greevil population explosion has cancelled Christmas in Dota 2, but teams Red and Blu face bigger problems in Team Fortress. The robot menace introduced in the MvM update continues to threaten the values that TF2's nine classes hold dear, like the right to not spend Christmas battling sinister robot versions of themselves.

A new, massive MvM map called Big Rock has been added to the playlist. The clanking hordes now feature robotic Engineers who can set up teleporters to help their robo-buddies leapfrog large chunks of the map. "Naughty" and "Nice" boxes will drop throughout the event, offering rare weapons and winter items respectively to those who have the festive frivolity to purchase keys for them.

The new weapons include "The Rescue Ranger," a high tech shotgun for the Engineer, a "Loose Cannon" grenade launcher for the Demoman and a new medi-gun called the "Vaccinator." It wouldn't be a Team Fortress event without a new comic. This one's called THE SHADOW BOXERS.

There's a large penguin on Steam's about page, so either TF2 has got itself a surprising 10th class, or Valve have released Steam's experiments in Linux delivery to the public.

It's the latter (although I really wouldn't put it past the TF2 team). Now anyone can join the Steam Linux beta, simply by clicking the install button from one of the relevant operating systems.

So far there are only 36 games available to try for the service, but between Team Fortress, Red Orchestra, Unity of Command and the selection of indie games, there should be plenty to keep you busy for now.

Valve have also set up a GitHub repository for bug reporting on any issues that will (inevitably) arise at this beta stage.

Anyone planning to take a look?

Lambent Stew's free, web-based Steam Time Analysis tool laid bare my backlog of shame by breaking down time spent (or not spent) on each of my library's games like some sort of cold, ruthless PowerPoint presentation. The breadth of information provided is quite impressive. Over email, Stew told us the new build includes a few new features that further visualize users' habits.

You're now be able to compare your profile with those on your friends list for games owned, how many were played, and total hours played. (Our own Executive Editor Evan Lahti only played around 16 percent of his over 1300-game stable, the lazy bum.)

Similar to another homebrewed utility, a new worth calculator also provides combined figures for minimum, maximum, and current game prices in your library. Locating your own profile should be easier with improved search: just type in your Steam profile ID, and the tool should easily zero in on your data.

Check out the tool for yourself on Lambent Stew's website. How do you rank against your friends? What's your most-played game?