I can see why this game was so praised when it came out. It looks really good for it's age, and is fun to play like the Predator while you are on the jungle.
But then it brings up aliens that are not fun to fight, it puts you on an alien ruin while you float and it loses it's magic. But the jungle levels are really solid, so buy it when it goes on sale if you want to know what the fuss was all about.