It was ok. It was AGA only I think, no RTG. You could probably get the best out of it if you had an accelerator. There was a patch for 68040 optimization, but it didn't work for me when I got my Blizzard PPC. Without the patch it's a bit slow :)
Here's something I just found on Google about it: Q. Will it be the full version?
A. Yes, as far as was completed. 100% working although slightly buggy in places. It's a blinding game!
Q. Will TFX be on the floppy disks as well?
A. At the moment, no. We are doing our best but don't hold your breath, it's quite large.
Q. What kind of machine does TFX need to run?
A. Any AGA Amiga with the 2MB of Fast RAM and a hard drive though of course the faster the better. There are FPU and 68040 versions but it does not run on the 68060 at this time, we're working on fixing this.
Q. Why wasn't TFX released?
A. At the time an (fast) AGA Amiga with a hard drive and Fast RAM was considered to be too small a market. These days this isn't a problem.
Q. Why are CU Amiga giving TFX away?
A. Because we can, because we know you want it and because we're the Best Amiga Magazine in the World.The magazine that released it was CU Amiga, issue October 1997. As far as I can remember their final issue was released sometime in 1999.