The RetroPie team took its time on purpose with this one and is still calling the support for the Pi 4 "beta," although it's now available for everyone and included within the 4.6 install.

To install Retropie you need to download the image file from the downloads page and write it onto the microSD card. Note that there are two downloads, one for the Raspberry Pi Zero and original ...

10:26 am April 30, 2020 By Julian Horsey Raspberry Pi gamers patiently waiting for the awesome open source game emulation software RetroPie to support the latest and fastest Raspberry Pi 4 mini PC.

The RetroPie team took its time on purpose with this one and is still calling the support for the Pi 4 "beta," although it's now available for everyone and included within the 4.6 install.