Hey man, sorry for the Late reply. Have you tried validating the integrity of you Game Caches for both Dying Light and the Dev Tools?

Haven't tried it. I'll give it a go. Thanks man! No worries on the reply. I'll wait days to get em running :)

Did the game validation. How do I get the developer tools? I saw in the workshop there was a "Developer tools example" to subscribe too, but that was it.

Re-post:
Here's the list I have so far:
The Tunnel - Missing walls. Can't do much
Delusion - Was alright, still choppy as heck on lowest settings
TeeVee - Another one that was alright, just hella choppy
City of Walkers - Missing walls and other barriers, invisible zombies too
Zombada - Crashes to load screen every time I try to start
Dying Space - Seems OK so far
Escaping Death - missing floors, barriers, some wall, and zombies
de_Dust2 - missing barriers, zombies, "Gordon", whom you are supposed to talk to. No sound from him either. invisible zombies

So far those are the only ones I've tried. Kinda guessing they just might not be made very well? Seems many share the same problems of missing barriers or zombies.

Tried all on my lowest settings, most are still at the least, very choppy and laggy. Going to look into the workshop board more as well. Thanks guys, I appreciate the input!!

I've since unsubscribed from those custom maps. I'll re-add them, see what happens.

Ok cool, you can find the Dev tools under the tools section in your steam library.

Ahh! i' m such a noob. :)

Works! Just had to go to the control panel, 3D settings, and change the graphics driver to the Nvidia high performance for Dying light. Very nice!