Cool Fear is a nice game. Hey you could play it with mp as long as all parties have the same KPF file 
Edit: Tried to Download got an error on the page. "%22 The Site Can't Be reached"
May want to check your link there. or better yet send your mod to Duke64 to put on https://turoksanctum.com/
Done.
I was going to go with different weapon sounds for both the Firestorm Cannon and the Grenade Launcher, which would've been the respective sounds of the minigun from the expansions, and the grenade launcher from Perseus Mandate. The former was WAY too noisy and unpleasant to listen to, so instead I opted for the "Vulcan" sound effects which were less of a pain to listen to. The latter's sound was pretty okay, a nice and deep "PHOOMF" and a cycle sound that made it ideal to use initially, but the Cannon sounds from F.E.A.R were much more beefier for both the firing sound and the cycling, so I opted for that instead. If you want, I can include them as a seperate download each, and make a video that previews them.
Fun fact, the winding sound of the Firestorm Cannon engine is actually the sound of the Assault Cannon from Team Fortress Classic, slightly edited to compensate for Turok 2's sound speed scaling.