Some people wonder why L4D2 cannot handle more than four survivors at any one time. Well, this video should be more than enough to tell you why Valve decided to limit it. This little clip shows the chaos that ensues when 16 people are allowed to join a L4D2 server, before it decides to crash.
As you can see, anything more than 4 player co-op is just pure chaos.
Left 4 Dead 2: 16 Player Campaign Coop [YouTube]
Left 4 Dead 2: Dead Center with 16 Players [YouTube]

Can anyone tell me how this is done? Me and some friends frequently host small LANs at each others houses and we all love this game but the 4 player limit kind of sucks if we all want to play, and joining an existing 16 or 20 player server would also suck because it would lag like hell and 16 or 20 players with no teamwork would be too chaotic. If anyone could give some tips we would definitely appreciate it.
Thank you.
Hey this is my server, thanks for posting about it! IP is 128.61.84.131:27015 and has been upped to 20 players.
Yeah, I know of these servers, and I’m glad I enjoy my intense games on expert with 4 people rather than with 16. though I can see the benefits (special infected stand no chance, easier to get helped up by 16 people) I much rather be in teamwork with just four, that’s what makes the game so fun.
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Too bad i got L4D2 for the 360, if i knew there was a mod like this, damn. And 8 vs 8 or 16 vs 16 versus would own
Tovan you found an excellent mod. This will serve many people that love the Left4Dead series. Its been a while since I seen a cool mod. I gotta try this out for myself. A big thanks Kreyg for the Server IP address or do I thank Tovan for that?
LOL my system would be laggin for sure
ive been on one of these type surves with 16 survivors and 20 infected. it was a multilated head full of fun!
wow man thats crazy lol
holy crap, i think it would have been better to have been given the choice of up to 16 players
GET TO THE SAFE HOUSE!! “I CANT THERES PEOPLE IN THE BLOODY WAY!”\
but we LOVE CHAOS!
Well, what makes the limit to 4?
Did they just want an even number?
I mean… could it have been 5 v 5?
Or something along that sort.
but then it would be called left 5 dead..whcih..uk..is..weird
Goddamn, that looks ridiculous! Lol.
co-op gamemodes shall not exceed 4 players: unspoken rule.
i smell a reality TV show brewing…
THE REAL WORLD, zombie slaughter house!
But it would be so epic!
Imagine doing this on the broadcast. 16 players in GTA is already enough to drive me insane, but this, the pure chaos that would ensue would be beyond anything we have ever seen before.
I’ve seen the chaos with just 4 people trying to get through a door and close it. Imagine having 16 people trying to do it. And with that many there’s always gonna be a few jicks that shoot other players all the time, wake witches, close the door, or whatever else they could think off to annoy others.
I would imagine lots of friendly fire also, lol.
It also must be nice to be able to use CS:S weapons too. That server looks like it would be fun as hell with at bunch of friends. To bad it can’t handle the awesomeness
this looks so fun, there should be a mod that allows 16v16 or 16v4
omg, let the epicness ensue
Even thought its mass chaos and it will crash the server, I still think that it actually looks pretty fun. I would want to try this
Oh no doubt it would be fun as hell to fool around in. But if you’re trying to play through the game seriously, even 5 people is going to turn into chaos.