After a great success of the first game (UFO: Enemy unknown, or X-Com: UFO defense), Microprose hurried and made a sequel. That was a mistake. I am not saying that this game is not good, but it's pretty much the same, only underwater. The graphics engine, gameplay, strategies... Everything is the same, only harder. See it Yourself - if You liked first game You'll like this one too, but You will be disappointed when You see that there is not much difference.