Vying for video virtuosity PHOTOS BY JEFF GRANIT staff Above: John Dacruz, 13, (from left) Dylan Sorrentino, 12, and Mario Duarte, 13, play in the Halo 3 Slayer Tournament for teens at the Old Bridge Public Library on Dec. 27. The tournament is based around the Xbox game. Below: Dylan Sorrentino, 12, (l) and Sam Willis, 13, concentrate on their gaming skills.