2 things

1: the navmesh is a bit buggy
i tried the map spawner from lethal necrotics mod and most zombies spawned in stuck areas like inside stairs or couldnt get up to a area i was in

2: the sewer is a buggy place when i went in there were places where i could see the skybox and sometimes i get stuck on a invisible wall wich ruined immersion

good luck on fixing :D
you did a awsome job with the map
hopefully the map will get to a state where it is completely fixed with no bugs and very good for zombie survival

Thanks for feedback.

About the sewers, as you can see in the description, they were in test to add it, but not done in any case obviously. There is many things missing in sewers and AI is not supported in this area for now.

For the navmesh, no level has taken more time to create it, they has been modified, fixed and optimized many times with beta testing since past years. Bots really act like humans has the meshes are almost fully manually recreated or modified to ensure a perfect control on AI, but remember that it is for Counter-Strike Source. If some NPCs (also like you the player in attic for example) are stuck in some places, that's because Garry's Mod use differents hitboxes which are bigger than Counter-Strike Source. We are also terribly sorry to see that behavior, but we cannot change basic engine settings otherwise that using differents characters.

Still, thanks for taking the time for trying and playing our level!

ah alr it's fine
your welcome, besides the bugs its a really good map

We have to do a dedicated post about this in detail to let users discover everything behind in the shadow for the Navmeshes and globally the Garry's Mod adaptation. This would be helpful to future users.

Thank you very much by the way, appreciate the support!

Thanks too!

The Combine in the Combine base or whatever that secret area is called, the one's that are to your right behind the door are just running in place and stuck in each other. I can send a screenshot if required.

Great map though!

Indeed! However you are not supposed to see it as they sequence start when you open the door. Same for Gman sequence if you look on the left window at the main door.

some parts have missing textures how do i fix this?

Can't do anything without any detail. Explain your issue, give informations and send us pictures of what you encounter.

It is wrong indeed, because you didn't entered as intended. It has been answered few comments above from Delter-12.

A LOT of ERROR words

Check the informations on this article if you have error models and missing content.
Please also share pictures if you want help.