Combine cream cheese and 2 tubs whipped topping in a large bowl; mix thoroughly; set aside. Cut the cranberry sauce into 1/4-inch-thick slices; set aside.
Melt the chocolate chips in a large metal bowl placed atop a saucepan of water over medium heat.
Line the bottom of a 9x13 baking dish with graham crackers. Spread a 1-inch thick layer of the cream cheese mixture over the graham crackers. Top the cream cheese with cranberry sauce slices. Repeat layering until ingredients are used. Top entire dish with 1 tub whipped topping. Drizzle melted chocolate over the whipped topping. Chill in refrigerator at least 1 hour before serving.