In fact, the best combination of compatibility and speed for Amiga Games is found in 68030/50MHz Amiga accelerators (older games have a habit of flaking out on 040s and 060s). I have an Amiga 1200 with a Blizzard 1230 Mk IV accelerator in it, with a the SCSI add-on module and 64MB (count em!) of FastRAM dedicated to playing games using a 5GB hard disk (internal) and WHDLoad.
I think this thread would be more appropriately titled 'why did game developers ignore the Mac?'
I don't go around telling people from the US that it's a pavement not a sidewalk...