Valve Accidentally Leaked Source 2 & Left 4 Dead 3
Valve had some tourists in their headquarters recently and it looks like they forgot to cover up their confidential debuggers. One tourist didn’t miss the opportunity to point out Valve is working on Left 4 Dead 3 powered by the 2nd version of the Source engine. No, Half Life 3 wasn’t on the computer log.
Thanks: Dota 2 Community