RetroArch is a cross-platform frontend for the libretro API that loads emulators and game engines as dynamic libraries called libretro cores.
RetroArch solves the problem of providing a unified interface for running diverse emulation cores across many platforms. The libretro API exposes generic audio, video, and input callbacks, allowing a single core written in portable C or C++ to run on multiple platforms with minimal porting effort. RetroArch handles video output, audio output, input management, and application lifecycle, while cores focus solely on emulation logic. The frontend features multiple menu drivers including XMB, RGUI, GLUI, and Ozone, along with a full-featured command-line interface.
RetroArch is suitable for anyone building emulation infrastructure or integrating emulators into launcher frontends. The project emphasizes portability and a gamepad-centric, touchscreen-friendly user interface. Beyond basic emulation, it includes advanced features such as multi-pass shader support, real-time rewind functionality, video recording via FFmpeg, and run-ahead input latency removal. The tool is designed to remain small and lean while providing core emulator features, making it appropriate for resource-constrained environments as well as feature-rich applications.
The project maintains active community engagement through GitHub issues, forums, Discord, and Reddit. Development focuses on both core stability and the addition of sophisticated technical features that go beyond typical emulator functionality. The codebase is written primarily in C and emphasizes portability across diverse platforms. Documentation is comprehensive, including a dedicated documentation center and Unix man-pages for reference.
