You're not going to find much info about these because
they really can be that rare. Problem is, no one really wants them except the hardcore CDI collectors... and most already have copies.
https://www.theworldofcdi.com/cd-i_encyclopedia/di...It's not even a game, it's more of a reference thing. I also own one CDI disc that's pretty much unheard of, there's no info about it online.
If you want to sell it, your best bet is to just list it at a low price, enable worldwide shipping, and let the collectors fight over it.