This workflow allows you to search & launch your games as well as easily activate nw steam keys.
Options: -a / --all list all games for all platforms -d / --dlc include DLC in the list -i/--installed only show installed games -u/--user [username] link to this steam community library (use your steam community name, not your signin name!)
The first time you try to use it it should prompt you to enter your username with the -u option. Just enter it in "steam -u [username]". Don't backspace to remove it as it will then delete your username and that won't work out for anyone :-) At that point it should start updating your library. This may take a bit depending on the size of your Steam library, just be patient. Subsequent runs should be lightning fast :)