CASS: MorphOS is AOS 3.x compatible and even capable on running PuP/WUP programs.. But differences are on hardware side. Many gamemakers have been quite liberal on hitting Classic hardware even if program does support AHI/RTG.
Crossfire 2 indeed seems to work quite nicely on this machine. if Demo version has music, that I did not hear.. SoundFx works ok though so it's not biggie... I'm not sure if it'll be my type of game but I'll test this Demo version some more. Especially I need to dig up those old CompetitionPro sticks and commect them to Catweasel.. I hope they'll work on this ..