Relative to this topic, the highlight of my life was the mid-to-late '90s and the original Quake. In the off-campus apartment complex where I lived, virtually everybody played this game. Being the days before wi-fi, we had (obviously small) individual wired Ethernet networks in a few apartments... so we would buy lengthy CAT5 cables and string them out our windows from apartment to apartment, connecting one hub to the next. (If someone wanted to be part of the fun but they were the only one in their apartment, we'd run a cable from one apartment's hub out the window directly to their computer.) On any given evening, someone would suggest we start a game... and anywhere from 3 to 12 guys would jump in and have at it.
I wish I had a photo of all the cabling--it was hilarous to see. Those were the days.