Woah... woah WOAH I wasn't expecting to see this on HN. I've been expecting this for a long time, and if I was valve I would have done something like this a long time ago: release a "final" celebratory content update, port the game to vulkan, and open source the codebase (keeping the item servers and whatnot tied to valve's servers). I don't know if this is the beginning of the end or the end of the beginning of TF2. There have been leaks before but this is huge news.