[Best RetroArch core list]

By the way, thanks for the posts above, very helpful for the less skilled emulators (like me) out there!

The spreadsheet took a lot of work!

[Best RetroArch core list]

For Sega Dreamcast I like the ReDream emulator free version using the OEM bios, (e.g., epr-21576g.bin renamed to boot.bin).  

This restores the default Dreamcast intro (versus the ReDream bios included), corrects glitches with menus in the games, and enables saving the games, etc.

I found the upgrade ($5) upgraded resolutions looked great but the higher resolutions and pixel processes required a lot more computing power.  Great simple emulator!

[Unzip or not unzip that is the question]

The Redream emulator for Sega Dreamcast will not recognize the zipped game files. 

On another point, I was having sounds problems with Redream games with the premium version.

Turned out my Radeon video card (which doesn't support Open GL) was the problem.  I replaced the 

card with a nVidia adapter and all is well (Open GL supported).  

Cheers