This is correct.

The 3DO always resets when a disc is inserted. Games therefore expect a saved game in the NVRAM to be there. So set the NVRAM storage to "shared" and just play the game as normal.

The only reason for multi disc support in the emulator is to make the NVRAM shared. Not an useless feature but I've been busy with other things.

(note: I'm the maintainer of Opera)

@duglor

I don't understand what you're asking exactly. As I said... just set the control to 3DO Lightgun. That enables the 3DO Lightgun controller which is emulated via the mouse. It's not really any different from any other core.