I worked for a software publishing company which included games and 'edutainment' titles across all platforms, including PC. Wolf was okay, but when Doom released with multiplayer support, I was hooked and can recall clearly my first interaction with multiplayer and couldn't believe my eyes, I thought it was magic, it was so cool vs. the console games at the time (My first game was pong when it released).
I worked in tech support and we played the first iteration of the game, installing and running the multiplayer off a server, which brought the company network down one day (200 employees). We had no clue that the game was pinging each network port in the company, looking for the clients running the game. Luckily, IT figured out how to run the game without a server and we were saved (we blamed the network outage on testing one of our crappy games).
Once we figured out how to do multiplayer without a server, every lunch break a group of us would play Doom, Descent, Quake, Duke Nukem, Raven studio stuff. Those were great days which led to building out an 8 player gaming room in a spare bedroom with all the PC components no longer needed by the developers and QA at work. That was the start of the LAN party and it was a lot of fun, all due to DOOM.