Been trying to play coop with several friends and the game starts to lag for everyone as soon as the 6th player joins. 5 players or less and it runs with no problems and it didn't matter who hosted or which of us dropped or joined. It was only when people dropped to get it down to 5 or less players that it was playable again.

Each of us has pretty decent systems and fast internet connections. Anyone know if it requires a dedicated server for 6 or more players? Are there any limits for local hosted matches? Has anyone been able to play with 6 or more players on a local hosted game?

Zumo

I'd say you're gonna need a dedicated server if you wanna game with more than a few of your friends. More than likely it's your upload stream that's holding you back. You can dload all day long at a fast speed, but if you can't get the info back out fast enough....lag.