Retrograde is a libretro front-end in early stages of development.
- Bezels (images/bezels) from Tatsuya79's handheld border shader pack: https://forums.libretro.com/t/handheld-border-shaders/2551
- Guest.r's shader and Sonkun presets from https://forums.libretro.com/t/sonkun-s-crt-guest-advanced-slot-mask-presets-thread/39091
- All other shaders from RetroArch