MIX cookie crumbs and butter until blended; press onto bottom of 9-inch springform pan. Bake 10 min.
MEANWHILE, crush 25 mints. Beat cream cheese and sugar in large bowl with mixer until blended. Add eggs, 1 at a time, mixing on low speed after each just until blended. Add white chocolate, crushed mints and extract; mix just until blended. Chop half the semi-sweet chocolate; stir into batter. Pour over crust.
BAKE 55 min. to 1 hour or until center is almost set. Run knife around rim of pan to loosen cake; cool before removing rim. Refrigerate 4 hours. Meanwhile, crush remaining mints; chop remaining semi-sweet chocolate.
SPREAD cheesecake with 1 whipped topping just before serving. Drop remaining whipped topping in dollops around edge of cheesecake. Sprinkle remaining crushed mints and chopped chocolate over center of cheesecake.