Are you sure? With memory costing hundreds of dollars per MB in the mid-80's, I remember thinking a 24-bit address bus was plenty. (I actually don't think I personally had a computer with enough RAM to need more than 24-bits of physical addressing until the mid-90's.)
Ofcourse that was probably pretty unlikely considering the Acorn/Olivetti bet so heavily on the education market.
According to https://en.wikipedia.org/wiki/Instructions_per_second#Millio... the ARM2 at 8MHz was 4MIPS. The 386DX at 33MHz was 4.3MIPS. The 8MHz 68000 was 1.4MIPS.
Of course there could be other things that made it hard, such as too few bus cycles when running the 8-bit chunky graphics mode? Or that sound did not use DMA(I don't know if the Archimedes had sound DMA) or that the CPU had to mix samples instead of the sound hardware doing it?
This was the gold standard at the time.
I wonder what the connection is.
OTOH, the sqare grid terrain can be traced to at least https://en.wikipedia.org/wiki/Return_Fire although that was a sequel to a completely different game
The Atari ST was built from scratch in less than 8 months after the deal to license the Amiga chipset fell trouhg. The ST is an amazing engineering feat considering the insane schedule.
I agree on you that the 68k is a terrible CPU for gaming, but it got better when there was some cache added to it, starting with the 68030.
I had an Acorn Archimedes with an ARM 2 clocked 8 Mhz (the same speed as the Atari ST, and 1 Mhz faster than the Amiga 1000/500), it was so much faster than my ST.