I am going to bring 4 laptops along with me on a road trip. Two are PC laptops and two are Mac laptops. I want to play Starcraft with some friends, but I do not know how I am going to connect all of them together to play Starcraft. We will not have the internet, and we will not be able to bring a router/hub. I was thinking of connecting them through USB or serial, but I could only connect 2 computers together. How can I link all of these computers together?