Has anyone been able to get a Vpn add-on to function on Retropie Kodi? I have seen other Rpi OS guides but they did not seem to work. I also tried the openelect PIA add-on from metalkettle but it failed. This is a great service that I think is the next needed added feature to RetroPie.
Sorry, but this is way beyond the scope of this project. as RetroPie is based on top of Raspbian, you should be able to get a VPN up and running by following some guides. If not – you could post on the raspberry pi forum for help with it.