http://hol.abime.net/2412
Marblelous II
HD-install: YES (Disk2, unlike the info in guide on disk) and its recommended.
If you have installed the Game on HDD, you have also the choice to play special RTG-version.
The HD installed version also takes advantage of the AGA-chipset.
Info taken from Amigaguide on disk 2 of the game(guide in german language).