I think I answered the point about the stuff not being on board already (in short, I prefer the form factor), but since you asked about titles:

I'm interested though, is there a listing somewhere? What you've listed is pretty much the well-known pantheon of late '90s or early '00s Mac games. All it's lacking is Myst/Riven and Bugdom/Nanosaur. Oh, and RTS "command the units" games, neverwinter nights (did that make it to Mac OS 9?) and Tomb Raider. (Incidentally, a few of these things I played on my 7300 when I had it the first time 'round in the very early 2000s)

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... here's what's on it. There's actually more than what's here, but I haven't hacked Nanosaur yet (it's the iMac version and it has a lockout), and there are a few programs I'm going to load into Mini vMac since they do better there. I mostly favour FPSes and action titles; I use ScummVM on the G5 for the LucasArts games, even the ones I have that are Mac-native. I have Myth around here somewhere, but I never got into it, and I didn't enjoy Myst.