Left 4 Dead 3 and Source 2 have both been spotted on Valve's internal project tracker, after members of the Dota 2 subreddit were given a tour of the company's Seattle offices.

The picture taken primarily shows updates to Dota 2, but nestled between are references to the Source 2 engine and a L4D3, and Reddit member Cyborgmatt uploaded a zoomed-in graphic to show the applicable entry up close.
The current Source engine made its public debut in 2004 with the launch of Half-Life 2 and Counter-Strike: Source, and has subsequently gone on to power Portal, Team Fortress 2, Left 4 Dead, and Dota 2.
Valve confirmed in November 2012 that it had been working on a new game engine for "quite a while" but suggested it was waiting on the right game before showing it off.
Left 4 Dead 3 was also reportedly spotted on a Valve project tracker in June.
Left 4 Dead 2 was originally released for PC and Xbox 360 in 2009, and has since been ported to Mac and Linux.
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I'll believe it when I hear about a L4D3 release date...
Im sure Valve would be saving the best for last
Dude, if we get a third L4D before we get even one more HL...
I think they're working on another Orange box-ish pack with L4D3, HL3 and possibly a new iteration of Team Fortress or Counter Strike.
Well, I don't think Valve has anything announced at this moment. Might as well be.
JUST RELEASE FREAKING HALF LIFE 3
Will this be an Xbox One exclusive?? Time will tell (This is in regards to consoles)
HL3 Confirmed lol
See! They can count to 3 when they want.
They just hate you apparently.
As much as i love L4D i'm disappointed, well that's my Half-life 3 hopes up in flames.
Valve could indefinitely claim to be working on everything and as long as the Steam store kept on selling like marble cakes they could do nothing and reap in the benefits.
I hope that's not what's going on and that this isn't just some elaborate ruse haha
Valve,try make a new L4D3 characthers
yeahhh
That is great news! I was wondering if a new Left 4 Dead was in the works.
If he did that in Greece he'd be locked up by now :P
valve are trolling and are now sitting with gabe reading the comments of there forums on there huge plasma screen and laughing there heads off.
meh
Gabo Arevalo Andres Mendez Garcia
omg!!! omg! l4d3 drop d and 4, and add h infront and what do you get??! hl3, half life 3 confirmed!!!
i would so love a l4d3 :) but please bring back l4d1 survivors
....Well the news about Source 2 is really cool.
I couldn't care less about Left 4 Dead 3.
I refuse to play games that are just as polished as a fresh turd.
(AKA the first 2 left4dead games)
In the same vain as Duke Nukem Forever and Alien Colonial Marines, Half- Life 3 will be out when its ready.
Or they are working on HL3 and are not leaking anything bout it.
I am so excited!
Well at least valve is consistent. Everyone things the next game is the next half life while it's really gonna be the next l4d. Also it's a 3 so baby steps.
I bet what it is Half-Life 3 running on Source 2 disguised as L4D3
They can count to three?!?! The end of the world is near!
We already know about Source 2. Gabe confirmed that Ricochet 2 would be the first game released on the engine. I also seriously doubt that we will get L4D3 before HL3, but I could be wrong.
I'm just as excited for Source 2 as I am for L4D3.
Personally, when it comes to Portal, I can't see how there could be a third one, but this brings hope to HL3.
@julzeverne HL is shit, L4d rocks. Half-life will be another first-person generic interactive movie streamlined crap a-la bioshit infinite while L4D is actually a game that challenges the player.
@mav_destroyer Yea right...
@BelaidKL no valve planed to put the orange box and other valve games on ps3 but couldn't due to the hardware. Now since the ps4 and x1 hard ware are more like pc valve will put it on both. they only chose the 360 instead of both because of development cost of the ps3
@gamingfrendly This.
@DarthJoe77 Bill is already dead though...
@DarthJoe77 no
@VenkmanPHD Right, because they totally weren't huge successes. That was sarcasm.
@youngzen69 Let's just hope it doesn't turn out like those other 2 you mentioned. lol
@SlawekAB That made sense.
Oh wait, no it didn't.
@Agent_Vincent87 @DarthJoe77 i know its a shame. maybe have the other 3 and a new one maybe another girl?
@lorider25 @DarthJoe77 yes
@Daian @VenkmanPHD I didn't say they weren't succsesful.
I said they weren't POLISHED.
Those games look THROWN together.
Just because something sells well doesn't mean it went through post-development so it didn't look like shit.
I just have standards.
@JayQproductions @youngzen69 Hahaha no kidding!
@VenkmanPHD @SlawekAB It DOES make sense because Valve have done this lot of times in the past . Valve are best at trolling , they have used fake name of video games in the past to keep their projects secret .
@JayQproductions this is the most retarded thing ive ever read. call of duty takes more skill then quake or even past halo games? what takes skill about ur movement being slowed down and ur screen gets more focuses through a sight.. nothing
@Daian @akdiuuuryttt @JayQproductions Yes, I know there are tons of games that don't let you aim down the sights of a weapon but in this day and age it is not acceptable, there is no reason to not be able to do it. It's also VERY unrealistic and most of the games that don't let you aim down sites where made 10+ years ago when aiming down your sights was almost impossible to do in games and take FAR less skill than those that allow it. The only people that prefer when games don't let you aim down the sights either have terrible aim or are lazy and want the easy way to play a game.
@Daian @akdiuuuryttt @JayQproductions halo has no iron sights lol
@akdiuuuryttt @JayQproductions lol, I think you need to play other games other than military shooters and Halo, there have been plenty of shooters where you can't aim down sight including arguably the best ever Half Life series.
Stop letting your own incompetence in playing FPS without using iron sights let you write senseless things on the internet.
@JayQproductions @VenkmanPHD @Daian dude have you played any other valve games? almost all of them have no iron sights in them. I prefer games without the sights but I don't complain when bf4 and call of duty has them
@VenkmanPHD you're nitpicking, the game would have never been this big of a deal if it was truly that unpolished.
@VenkmanPHD @Daian I kinda agree, L4D has always seemed like a quick cash in. You feel like your floating instead of walking and I absolutely HATE FPS games where you can't aim down the sights of your gun and the only reason I can think of to not be able to aim down sights is they didn't wanna spend the extra time coding and animating it.