You'd quite likely be right with 4 Mixa. Been playing over the weekend and on my reported 0.21 Mb/s could host 3 ok, but started lagging when we got 4 online. Based upon that I'm suspecting that to host you'd want a minimum ISP advertised upload of: 4 players - - 384k 3 players - - 256k 2 players - - 256k (anyone tried to host 2 player game on 128k?) Edit: Assuming separate voice app running (e.g. ventrillo) Of course, YMMV.