Dota 2. Valve didn't turn on the game's Diretide event this year, and the resulting fan outrage could probably be bottled up and used to start fires. So what in the world happened? A week or so out from Halloween proper, the company has finally addressed the controversy in a new blog post explaining why the event failed to materialize.
In short: The team was working on a major update that was meant to be ready around Halloween, so the assumption was that it would be easier just to launch that. Then it got delayed, and there was no time to stop working on that and start working on Diretide. Once the time came and the event was still missing, what happened was more or less a matter of figuring out how to fix it rather than simply stating that the company was aware. It looks as if the game's next update will contain a somewhat belated Diretide, which may not fix the problem but will at least help ameliorate lingering hurt feelings.