Very fun when you use the codes in the booklet.
You first start off as a Compy, a small weak dinosaur, the gameplay is very simple and realistic, you go around killing other dinosaurs (in later levels birds, and other Dinosaurs i don't know the names for) until you reach the end of a level. to make a long story short, this part is hard and its not so much fun trying to kill things bigger than you are. This in my opinion is a bad first impression for a game to give, a weak character with hard levels and because of this people just assume this is a crappy game but its not.
The best levels in this game are with the T-Rex, The Hunter, and The Human Prey.
The Worst levels are with all the others... lol, they aren't really worth noting.
The Graphics are great, The Audio is also great, Controls are responsive, and The gameplay is fun but hard.
I had fun playing The Human Prey levels, you're running away from the T-Rex and have to make it through 3 levels, using flares to distract The T-Rex as you shoot down other things in your way.
This game is worth buying even today, its probably going for like a dollar but remember use the codes in the booklet.