RetroPie is a system to build / configure and launch emulators on the Raspberry Pi.
RetroPie 3.0 beta 4 has been released. Changes include:
- Work around issue with RetroArch GUI not accepting input/freezing.
- Fixed up RetroArch control configuration via our new integrated input configuration.
- Moved RetroArch joypad configurations to /opt/retropie/configs/all/retroarch-joypads
Pre-built images and further information are available from the RetroPie project website. For those who want to install on top of Raspbian – the system can be installed directly from the GitHub project, where you can also find a detailed list of changes.
Good video introductory here – https://www.youtube.com/watch?v=LbCvNsyLmQw