I don't have much by the way of gaming for CDTV, but I do have two public domain discs for it which I'm sure contain tons of little PD games and programs, if you're interested
The first is called 'The CDPD: The Public Domain Collection for CDTV' and it contains 600mb of freely distributable software for the Amiga, inc Fred Fish disks 1 to 660.
The second is the Weird Science Network CD, which has later Fred Fish disks 800 to 975 on it, as well as Amos PD disks 478 to 603, TBag disks 1 to 74 and much more.
I know that the Fred Fish disks contain loads of cool stuff - and a list of their contents can be found HERE
Also, I do have some interactive encyclopedia-type discs for CDTV if those are your kind of thing too - please PM me for any more details and if you want to buy