This tool can do a number of things, including:

Quickly download, install & configure retroArch for over 20 systems and 2 joysticks
Allow users to launch ROMs wth drag & drop.
Download, Install or update the latest nightly retroArch, cores, shaders and redists from the libretro buildbot
Customize retroArch options and many cores.
Create playlists.
Generate configuration deltas (per-game overrides) for a library of ROMs and any core.

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