RetroArch was first out of the gates in many respects with support for Wayland, DRM/KMS, and many other graphics technologies which are still not standard in many Linux programs.

It can turn into a low-resolution but functional UI (RGUI) into a full-fledged XMB clone, and so on.

RetroArch can change its entire appearance with a few button clicks.

You can find many impressive shaders that can enhance the in-game look of a game.

It is also one of the only programs of its kind that supports up to 16 shader passes along with up to 128 shader parameters supported.

RetroArch has its own shader spec that is being extensively used and implemented by various other programs unrelated to RetroArch/libretro.

It was one of the first programs out of the gates to have frontend shader support to begin with.

It also allows you to rewind your games in real-time.

LibretroвЂ™s serialization support allows features such as rollback based netplay to be easily implementable.

It has features few other dedicated games / emulators have, such as:

It tries to be on the cutting edge of technology in terms of supported technology as well as trying to be as backward compatible as possible, a paradoxical goal if any. It is designed to be fast, lightweight, and portable. RetroArch is most popularly known for being a program with which you can play many emulators and games, which have all been customized and tailor-ported to the libretro API.

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