Congratz! You've been invited to the gmod ♥♥♥♥♥♥♥♥! Just click on subscribe to all. If you still have problems with missing textures or errors. It could because you don't have the game installed. Gmod grabs textures and props from installed source games. For example, if you have l4d2 installed, it will grab textures and props from it. If it is not installed, it will appear as errors. Follow these quick videos. Keep in mind, you need chrome to download these. Or you can force yourself to download the mega.nz app. But who would do that? Are these legal? I mean, it's in the lawfully gray area but i dont want to talk about that. If you are missing any of these source games, follow the link below. Also please scan any downloaded files from the video with your anti virus or virustotal.com . People in the comments haven't been complaining, but better safe then sorry.

Keep in mind, you may only need these extra textures for slashers. CAUSE THAT GAMEMODE IS VERY HARDWARE DEMANDING DEPENDING ON WHAT MAP YOU PLAY WTF THIS IS SOURCE HOW EVEN?! Because of that, we may play the gamemode, we may not.

Half Life 2 Textures --> https://www.youtube.com/watch?v=7ai-o4sFAYc&t

Left 4 Dead Textures --> https://www.youtube.com/watch?v=K_vmVZ41DqM&t

Left 4 Dead 2 Textures (may be not needed?) --> https://www.youtube.com/watch?v=xJX9I3YBNkc

Half Life 2: Episode 1 Textures --> https://www.youtube.com/watch?v=ZGlDs65-AMU

Half Life 2: Episode 2 Textures --> https://www.youtube.com/watch?v=KOldBWJYwjo

Oh, and at most you need css textures. That's required AT THE LEAST!
Counter Strike: Source Textures --> https://www.youtube.com/watch?v=DvOZHDifgvk