http://www.gamefaqs.com/console/gene...e/916377/24178
1.8 Are there any compatibility problems?
One or two.
Every single Genesis game I've ever tried has worked 100% fine. Even Virtua
Racing. I've not heard of a game not working on this unit.
The SegaCD portion however is a tad more fussy. It is believed that the
following games do not work -
Radical Rex
Terminator
Who Shot Johnny Rock?
Jurassic Park is said to take a long time to load, but does actually work.
Some people have reported issues with Lunar Silver Star... hanging on menu's
and the like. For ever person who claims it does not work tho, about 5 claim
it does. I'm pretty sure it works fine.
It's worth remembering people say the same about the SegaCD2, so it might be an
issue inherited from that.
http://classicgaming.gamespy.com/Vie...&id=51&game=12
There are a few Sega-CD titles that are not compatible with the CDX:
Jurassic Park
Radical Rex
Terminator
Who Shot Johnny Rock?
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And I found it somewhere that had information about Final Fight & Prince of Persia not working... but I can't find it anymore....