Titan Computer has put up their Web page describing the new game port, Alien Nations.
The requirements are a bit high for the Average Amiga user requiring a PowerPC Amiga or Pegasos with at least 166Mhz, 128MB available memory, 200MB virtual memory, graphics card with at least 8MB video ram, MorphOS 1.0 (for AmigaOS 4.0 no details are available)
You can find more information
on their Web page