We're planning to ship with 8 player support, mainly to keep our testing sessions sane
No reason we cannot have more but we want to guarantee a certain level of game speed initially so eight feels like a reasonable goal to aim for. We've yet to run metrics on the current multiplayer implementation so it might come back down to four, but I hope it will not come to that.
PC SPECS: Windows 7 Ultimate 64-bit, Intel Core i7 920 (PASSMARK:5008), NVIDIA Geforce 9600 GT GPU (PASSMARK:752) , 6GB RAM