>whats easier to port to AmigaOS? a game's entire source code
>or the game engine and make a new game from scratch to take
>advantage of the Amiga custom chips and software?
I'd imagine it's easier to port a whole game than just an engine and make a new game. Why? Most of the work is already done. If you make a new game on an old engine, you still have to design the new game and create it's new parts from scratch, draw new graphics, build new levels, etc. Porting an existing game is less time consuming than designing and creating new parts.
Also, please, people, forget about the custom chips. They are too old and slow to consider for new games of any consequence, and even ports of aging games from the PC are too demanding for them now. Plus, with AmigaOne/Pegasos users wanting support, it'd be silly to make a new game relying on custom chips that the guys spending the most money can't use, because the new hardware uses industry standard components, especially as those are far more advanced than AGA, Paula, etc. You'd be better off with a Voodoo3 and soundblaster via some PCI bridge, and even the now aging earlier Radeon models would beat Voodoo3. And without something like the SharkPPC available, we really can't even make full use of any of these PCI cards due to bandwidth to the motherboard's CPU.