Valve has released a sizeable Team Fortress 2 update, and for once, it's not all about hats.
It's actually about things that are useful. Like a new coaching mode, where you can jump online with someone who will teach you how to play. And a "new" map (a smaller version of Badlands). And a whole bunch of improvements to everything from the quality of voice communications to the game's bots. And three new classes (Demo, Engineer & Spy) have been added to TF2's training mode.
You can read the full changelog at the link below.