I had a random but good catch in the name of Serious Duke 3D on Steam.
Some very nice creators NSKuber and Syndroid have remade the classic Duke Nukem 3D as a mod of Serious Sam 3. And it is also VR compatible!
All you need is to have or buy Serious Sam 3 (VR edition if you want the VR mode) and download the different packages here.
The mod, which seems really well done, also got some new and modern elements, such as redesigned and expanded level areas, occasional enemy waves/arena fights and new weapons
I am speechless by the work done, the quality and the attention to details. The addition of VR is also very nice.