What is retropie-setup?

RetroPie-Setup is a shell script that turns a Raspberry Pi (or a few other compatible single-board computers and PCs running Ubuntu) into a retro gaming console. Running the script installs a large collection of video game emulators, which are programs that replicate old gaming hardware so you can play classic games from consoles like the NES, SNES, Sega Genesis, and many others. The script also installs EmulationStation, a graphical menu system that presents your game library through a TV-friendly interface with controller navigation. For Raspberry Pi users, the project also offers pre-built disk images: files you write to a memory card that give you a fully configured system without running the setup script at all. These are available on the project's website at retropie.org.uk and are the recommended starting point for people who just want things working without going through installation steps. If you do use the script directly, the process involves downloading it from GitHub and running it with administrator privileges. On the Raspberry Pi, you can install software either from pre-compiled binaries (fast) or by compiling it from source code (slow but more flexible). The README recommends the binary route for Raspberry Pi users because compiling everything can take a very long time on that hardware. The project is essentially a coordination layer that pulls together the work of many independent emulator developers. RetroPie-Setup itself does not contain emulators: it fetches and installs them. Documentation for the project lives at retropie.org.uk/docs and covers individual emulators, configuration, and troubleshooting.