- Mount HL2, CS:S, EP1, EP2. If you have DoD:S or TF2 mounted, that's fine. But remove anything else, especially CS:GO, breaks shit.
- Go to Addons > Enable All > Confirm
- Close Garry's Mod, Validate Game Cache, Restart Garry's Mod
- Try joining
Still doesn't work?
- Unsubscribe from all your add-ons. This can be done in the add-ons menu now with the uninstall all feature.
- Subscribe ONLY to the nebulous pack.
- Enable all add-ons, triple-check games are mounted.
- Restart your computer, try again.
STILL DOESN'T WORK?
- Go to Garry's Mod in your file browser
- Delete the entire folder, the first Garrysmod folder.
- Uninstall Garry's Mod via Steam Library
- Reinstall Garry's Mod
- Start it up, mount your games.
- Let it load add-ons
- Steam may crash, or just GMod. This is normal. Whether it does this or not, restart the computer.
- Start up GMod.
- Start up a Singleplayer game.
- Join.
STILL DOESN'T WORK, WHAT?!
- Install the WW3RP pack as well and then restart your computer and try again.
- Again, enable ALL on your add-ons.
- Try this time. The content itself doesn't actually help but it forces you to double-check you enabled shit and sometimes you gotta do it over and over again.
Remember, most important thing, enable all add-ons, double, triple check your games are mounted.
Wait, I'm late, really? My bad man.