-    The arcade business in Japan is a vast one. Publishers such as SNK and Sega have their own marquee arcades dedicated to their wares on multiple floors. Huge complexes housing arcade machines are popular amusement spots for the teenage and adult set. It doesn't stop there however, home JAMMA kits allow the end user to plug and play arcade boardsets at home. Gamest covers it all with the latest coin-ops and heavy advertisement from arcade equipment vendors.    Raycrisis is Taito's new shooter sequel to Raystorm. The look remains polygonal with crisp, geometric levels.    Shock Troopers 2nd Squad features commando blasting action not seen since the days of Ikari Warriors and Heavy Barrel.