Wolfenstein 3D, Doom, and Quake. Oh happy times. Where I worked at the time, blocked playing it during business hours with immediate termination if you were caught (two were and set the example for the rest of us). But after hours, half the engineering department stayed at their desks (including management) for several hours. After playing that, I started learning programming and changed careers to IT.
I think ID did change a lot of things with the first getting non-techies into IT. There were a lot of "engines" out there in that time and many of probably got our start working with the engines and coding.
Have a pint, ID... for the stuff legends are made of.