So after I got Steam to work on my PC Offline I noticed that all the games I have downloaded are showing up in the library as downloaded.....however I know for a fact that only 2 are actually in the steamapps/common folder. This is because with Steam I copied onto a USB drive, the games were copied to a separate folder via as USB Data Link Cable between the PC and Laptop since they wouldn't fit on my USB Drive and the 2 in steamapps/common were a test.
I want to keep the library updated on my PC and because the library is showing that I have games downloaded which don't exist in steamapps/common I figure there are other files which store this data which were copied with the Steam Files. While I could just download all the games onto my Laptop and copy over the updated Steam folder there's 2 problems:
My laptop's hard drive is smaller that my PC's and I download other stuff onto my laptop as well. It'll fill up before my PC does (main problem).
Steam might get an update which may stop my offline mode Steam from working (a concern but warranted).
So aside from the game in steamapps/common what else do I need to copy over/edit to make my game appear in the Steam Library on my PC?