Nintendo Co, veteran entertainment company, which for many years made a living out of making playing cards, has unleashed its latest attack on the UK computer games market, the Super Nintendo, costing a whopping #150: based on a custom Nintendo 16-bit processor, with eight-track digital stereo sound, some 33,000 colours and fast-moving graphics, the snazzy Game Boy successor is aimed at wealthy boys and girls aged between seven and 15; the firm predicts 500,000 shipments of the things in the UK by Christmas, gaining 60% share of the #500m market for video games; the #150 includes only one game – additional fun bundles cost upwards of #40; there are only six titles available at the moment, but there should be 30 in the shops by autumn; next year, Nintendo’s US subsidiary, in Redmond, near Washington, will launch a version of a compact disk player which enables full-screen, full-motion game play.