Some Serious Sam 2 multiplayer details were released today. A batch of new screenshots were also released of course.

The multiplayer features in Serious Sam II will allow for full co-operative gameplay on both PC and the Xbox® video game and entertainment system from Microsoft. The PC version will allow up to sixteen gamers to fight their way through the complete game via LAN and online, with the Xbox version allowing up to four players via Xbox Live or system link.

16 player Serious Sam? That's going to be complete chaos, I can't wait.

** Update **
It seems the release date has been, err, released. It's the 14th October apparently.