CAVERNS OF DARKNESS
COD which previously required its own engine to run is now supported by Risen3D.
What you will need to do is install COD into an auto-loading UDIR, you can use the R3DLauncher for this.
If you choose to do this manually, unzip the cc-cod.zip to the following folder ....
Risen3D\R3DGames\Caverns of Darkness\Pwads\
Now install theRisen3D COD addon