And to nit-pick even further: These images resemble the graphics of the Amiga and Atari home systems, which were 16-bit systems. To do this on a PC you would need XGA graphics (VGA couldn't do 640x480x256) which arrived at the PC around the time of the 386 processor, which was 32-bit. I think you could probably attach a XGA card to a 286 PC, but that was still 16-bit. I don't think anyone ever paired a XGA card with an 8088 PC, which actually was an 8-bit system.

So, this isn't even 8-bit art, it's more likely 32-bit art. :-)