Serious Duke 3D
How to set up Serious Duke 3D for Serious Sam 3.
Serious Sam 3
Download & install Serious Sam Fusion & Serious Sam 3: BFE from Steam:
Serious Duke 3D
Serious Duke 3D is a reimagining of the first episode of Duke Nukem 3D in Serious Sam 3.
Visit the Steam workshop page and click on Subscribe to all
If you have any issues getting the mod to run, follow the troubleshooting guide: