I've found the box art for a possible unreleased Saturn title called Shadoan in a US magazine: Anyone ever heard of this one? From what I can tell (and even the normally reliable Satakore has nothing on this one!), it was originally an interactive FMV adventure game on the Philips CDI, which was later ported to various systems during the 32-bit era, including the Saturn, or at least that was the plan. I'm fairly certain that if this was indeed released, it was only in the US - based on the cover image available - and may have been limited to a very small market due to its publisher's lack of funds. Again, more concrete information would very much be appreciated...
The ESRB doesn't even have it rated for the Saturn (http://www.esrb.org/ratings/synopsis.jsp?Certificate=1825&Title=Shadoan&searchkeyword=Shadoan ), contrary to the box art.