A fellow archivist named gogo ZNukem Friend, recently discovered a prototype of Duke Nukem 2 on a BBS IBM #145 wares tape. You can now access our DNC archives thanks to him. Here a link and some Youtube demo Gameplay.
Link to the build:
https://dukenukemcentral.com/archive/?dir=DukeMightyArchive/Prototypes/DN2/Ver1.4b
Gameplay video