Valve loves its fans, and fans love Valve right back. This relationship has led to some amazing things, with the latest being Team Fortress 2: Robotic Boogaloo.
Team Fortress 2: Robotic Boogaloo is a new update hitting the popular free-to-play shooter with content that was made entirely by fans for fans.
Here's the official word from Valve:
This update is 100% created by the TF2 community. And when we say everything, we mean everything—the in-game content, the update hub website, the animated short, the comic, even the splash images in the Steam store. Even better, everything you created avoided the classic trap of using other companies’ intellectual property. (Those of you working on a Darth Vader Pyro mask, we've got some bad news for you.) Plus, in a first for the Team Fortress economy, all the creators of the Robotic Boogaloo Update have decided to share the revenue earned from the sale of RoboCrate Keys. That means that everyone involved will be profiting from this update, not just the people making hats.
Those concerned about Valve stepping back from Team Fortress 2 development need not worry. Valve says that its own content will co-exist with fan-developed content from here on out.