I remember playing for years with a few friends at Serious Sam the 2nd encounter (to not be confused with Serious Sam 2), we could play in 4 with just one compu

I remember playing for years with a few friends at Serious Sam the 2nd encounter (to not be confused with Serious Sam 2), we could play in 4 with just one computer and 2 monitors (you configure it in window mode, and you put the very wide window in the middle of 2 displays). it was a lot of fun, especially the last levels where the horde was immense (and the computer didn't freeze)