Those are some excellent titles! But I always had trouble with BOTH Fallout 1 and 2 on Classic Mac OS :/
On my iMac G4 in classic mode, or my PowerMacintosh 8600 running Mac OS 9 natively, saving and loading would often result in crashes, freezes, or other interruptive behaviour. And with a decision critical RPG, the possibility of losing an hour of save time makes it unplayable.
I ended up having to play through both whole games on PC