Before Kali, in the mid-late 90’s, we had had a 4-node dial-in BBS in my area code (813) called The Arena that ran an app called SerIPX - basically IPX over serial - to allow 4 players to play Doom. It was an incredible experience at the time, especially when paired with Dwango5.wad and other 4-player centric maps. Worked great on a 28.8k modem, direct, with no TCP/IP.

So many memories, but I wish I remembered more from that era. Crazy to think it was a quarter of a century ago.