RetroArch is a free and open-source software that allows you to play retro video games on various platforms, including the Nintendo Switch. It is a powerful emulator that supports a wide range of consoles, including the NES, SNES, Genesis, and more. RetroArch also has a number of features that make it a great choice for playing retro games, such as save states, rewind, and netplay.
Installing RetroArch on the Nintendo Switch is a relatively simple process. First, you will need to download the RetroArch NSP file from the official RetroArch website. Once you have downloaded the NSP file, you will need to install it on your Switch using a homebrew application such as Tinfoil or DBI. Once RetroArch is installed, you can launch it from the Homebrew Menu.