Live movies, all computer games are just variations of a handful of plots or themes. So what makes one computer game better than another when they both have the same underlying theme? The answer to that one is not easy at times, although there are times when the answer is blatantly obvious. Every now and again, though you get a combination which 'clicks', and makes for a very playable game. Such a combination is to be found in this game which ranks among my own personal league of addictive games. The theme is simple; whilst fighting off flying baddies you have to kill off a colony of something or other which are hatching out at the bottom of the screen. The only thing which will kill off the hatching "things" is a rock, or boulder, which appears at the top of the screen. By nudging the rock you manoeuvre it until it eventually falls to the bottom of the screen, hopefully killing something. It may sound easy, and at first sight it may look easy, but after two hours I had only managed to get through eight different screens. My verdict: different, enjoyable, and to me, addictive.

B.B.