Own every game, still missing textures

As you can see in this photo, I’m missing textures for some reason.

I have these games installed:

Half Life Episode 2
Half Life 2
Half Life 2 Deathmatch
Half Life 2 (not installed)
Portal 2 (not installed)
Day of Defeat: Source
Wiremod SVN

What else am I missing to cause these textures to happen? A lot of the walls in this map were missing as well. Some floors were basically funky textures like when you go out too far in the original DOOM (blurry and neverending).

Start up CS:S, EP2, Deathmatch, and DOD:S.