Even the enemy AI could be modified (albeit relatively limited) by editing the text CON files.
Anyone else remember playing over LAN with friends, dropping a Duke hologram in an elevator along with a bunch of pipe bombs hidden at its feet?
We had LAN parties and would play for hours on end with custom maps we had built or downloaded.
I heard the sound effect of that when I read you're comment.
We also had a really good LAN there.
Blast from the past indeed. Many many moons ago, I came up with a "bright" idea of designing a mod for Duke3D that modeled the office of my then-employer (large fintech company). At least I had enough sense not to boast about it - several months later a crazy guy brought a shotgun to HIS former employer and made national news, I don't think people would have taken my creation as lightly as I did back then. Still, working on it was fun.