I'd rate this game 8.75/10.00 because I mean theres only five aliens, if diamondhead, wildmutt, and ghostfreak where there the gameplay would have been much better.
But the game has no other faults, the script was amazing and it portrays our young hero very well unlike some others.
Graphics are amazing, the fact that you can time out is awesome if only there was an expansion pack with more aliens.
