Duke Nukem 3D shareware version including with EDuke32 for running natively on your computer without relying on emulation of any kind. Windows 2000, XP, Vista, Windows 7, whatever -- it'll run on it. Linux is also well supported, even with a fully 64-bit distro and no 32-bit compatibility libraries. If compiling stuff isn't your thing, no sweat -- we support Wine, too.
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Maybe this'll help:
https://moddb.com/engines/eduke32/downloads/duke-nukem-3d-shareware-13-eduke32-ready1