Valve tour leaks Left 4 Dead 3?
posted on 08.05.13 at 11:23 PM EST by (@salromano)
Source 2 engine mentioned, too.

Members of the Dota 2 sub-reddit recently toured Valve’s headquarters in Bellevue, Washington. The group uploaded a number of photos from the tour, but one stands out more than others.

The image—of Valve’s internal change log—mentions “L4D3,” an acronym for the unannounced, oft-rumored Left 4 Dead 3, and “Source2,” Valve’s new engine.

Take a closer look:

Thanks, NeoGAF.