Keywords used: RetroArch custom themes download, XMB, Ozone, assets folder, libretro, emulation frontend, Steam Deck themes, RG35XX customization.

This article provides a definitive guide to finding, downloading, installing, and even creating custom themes for RetroArch across Windows, Linux, macOS, Android, and iOS.

While the RetroArch theme repository offers a wide selection of custom themes, you can also find themes on other websites and forums:

Search for: "RetroArch custom theme pack download"

If you tell me your platform (Windows, macOS, Linux, Android, Raspberry Pi), I can give exact folder paths and a short step-by-step for that system.