Re: Sin Episodes in GMOD
Not sure really, But try this,
In the steam games list right click on Half Life 2, click Properties, Click the tab Local files, Then finally click Verify integrity of game cache...
Wait for it to do its thing then try again.
Let me know how you went with that.
Gmod can be unstable at times if you run a map from hl2ep1 that has the core ball in it you are guaranteed to crash.
Maybe you should add me to you Steam Friends list as this is taking you a long time to work things out, So add me so I can help you, my username is fgcsparda , If you don’t know how to add me just tell me what your username is when you log on to steam.