Heat oven to 350°F. Place pie crust in 9 1/2-inch glass deep-dish pie plate as directed on box for One-Crust Filled Pie. In medium bowl, stir brownie mix packets, 6 tablespoons water, the oil and 2 of the eggs until well blended. Set aside.
In another bowl, stir cream cheese filling mix packets,1/4 cup water and remaining 2 eggs until smooth. Stir in 1/2 cup peanut butter. Spoon half of brownie batter into crust-lined plate; top with mounds of half of cream cheese filling. Spoon remaining brownie batter over filling. Top with small mounds of remaining cream cheese filling. Cut through with knife to swirl. Bake 1 hour. Cool on cooling rack at least 2 hours.
In small saucepan, heat hot fudge topping and 2 tablespoons peanut butter over low heat, stirring until smooth. Serve pie with hot fudge sauce.