[Nickelino]

Thanks for your try. I really appreciate it.

I destructed my Linux several times so I decided to do backups before changes.

I recommend you to do the same (clonezilla is really nice to do it) and you have to install Retropie with the setup script. Retropie x86

Code:

cd ~

git clone --depth=1 https://github.com/RetroPie/RetroPie-Setup.git

cd RetroPie-Setup

sudo ./retropie_setup.sh

Hope you're able to get it working.
In my opinion RetroPie is the best emulation solution and it's a must-have in the Kodi-Openbox-Environment.

Greetings

Nicke