[url=http://kotaku.com/valve-tour-leaks-left-4-dead-3-1036602962]Source[/url] [quote]...Tourists at Valve's Seattle-based headquarters may have inadvertently leaked the existence of Left 4 Dead 3, a sequel that is not entirely unexpected, but still unannounced. Check out the following photo, shot by members of the Dota 2 Reddit community, who were invited to visit Valve while in town for the Dota 2 International this week.[/quote] ...Meh