How can it be unofficial/bullshit when Valve said it themselves Source please. ValveNews twitter ain't Valve. It's right in the OP http://store.steampowered.com/news/2708/ If you're talking about the release date being today, I read it on Facepunch/Mr. Green, so it might be bullocks. Yes, it would be released in September. But when in September was never confirmed by Valve.