I started to work on my mod and was not able to get it into my steam library, I looked online and was told to change the gameinfo.txt to the one they use in the "Source SDK single player 2013"; I did and got it to work. But, i'm not sure how, but when I was working on my mod further, it disappeared from my steam library again.
Any suggestions? Or, if I put the file online would anyone be willing to look at what is wrong? leave a comment if you would.