Now, it has extended to a bigger project featuring ARM-based devices. Primarily, it was built from the Raspberry Pi EmulationStation application, a former RetroTech emulator front-end. It’s an excellent application that works on open-source operating systems like Ubuntu and works greatly for Raspberry Pi, PC devices, and many more. RetroPie is the most popular and one of the best Raspberry Pi emulators you will hear about today.