RetroArch is a modular Emulator, which supports "cores" (like libraries) for all sorts of retro systems - from Atari VCS 2600 till Sony Playstation.
To adapt a new "core" is easier than writing a new emulator - stuff like sound, video refresh etc. only needs to get implemented once, in the main exe.
RetroArch for AmigaOS (initially only OS4, I try to make WarpOS and 68k versions later too) will be different to my usual way of distribution - FREE (too many emulator cores have restrictive licences which do not allow commercial exploitation).
Of course as this is a mammoth project to port many cores it would be great to have some donations to allow me to spend more time on this project.
There might be a few "commercial core ports" later (thinking PSX, N64, Gamecube etc.) but asides from the "3D cores" all other cores will be free.
Donations can be done by PayPal to
tirionareonwe@gmail.com. If you donate remember to also send me an email so I know to whom to send a Beta version

And if you prefer to wait for a stable Beta, or want one immediately.
Every one who donates
At least 10 EUR -> gets the Beta versions. And if there will be "commercial cores" at least one commercial core free.
At least 15 EUR -> gets the Beta versions and if there will be "commercial cores" all of them free.
Note I cannot guarantee a specific core will be successfully ported. But I will try to make a lot of them. I also will try to port a recent Mame port (included in the "free cores") but also there no guarantee.
If you donate now you can immediately get a Beta. The Betatest already started (current Beta crashes on Exit though, I will fix this with the next Beta ^^).
RetroArch includes a GUI and an installer. A future version could also be used as Videoplayer (RetroArch supports using it as frontend for ffmpeg - current Beta does not include this, but probably I will add this in later).
Currently supported Cores in my port are:
SNES9x - SNES
Mednafen Supergrafx16 - SupergrafX 16, PC Engine
Genesis Plus GX - all Sega 8/16 Bit machines, including Megadrive CD
There will be more cores.
Total list of possible cores to be ported:
https://docs.libretro.com/guides/core-list/MagicSN