The early 3D FIFA games used a 3D pitch, with 2D sprites for the players. The Amiga can handle this surely? Quake and Payback uses polygons for graphics. And 3D FIFA is not as complex as Quake or Doom. I think it can be made to run pretty well on Amiga. It ran on 3DO pretty well, and their processor was the equivalent to an 030, although the 3DO had better graphics (GPU). I think an Amiga with 060 AGA/GFX would handle it no problem.