Duke Nukem 3D is one of my all-time favorite computer games, and I love to fiddle with it. Thanks to the original developers including the development tools on the CD-ROM, I made a lot of add-ons for it back in the 1990s. They're not all here yet because they were made to be deployed in an MS-DOS-compatible environment, so I need to polish them a bit to work better on modern operating systems.
I also made sort of a gameplay manual so that I could highlight my general modifications.
Add-ons coming soon!