Freeze the crust until firm, about 30 minutes.
Place half of the coffee ice cream into a bowl and let it stand for 10 minutes or so to soften, and keep the remaining ice cream in the freezer.
Mix the miniature chocolate chips into the ice cream, and spread the mixture in an even layer over the pie crust. Cover with Saran Wrap and freeze for 2 hours.
Heat the hot fudge topping in the microwave on low until warm and easy to pour - probably 30 seconds to 1 minute. Be careful to not get the topping too hot. Pour the hot fudge into a bowl and mix in 18 of the crushed Oreos. Remove the pie from the freezer and pour the hot fudge and Oreo mixture onto the pie. Cover with Saran Wrap and freeze for 2 hours.
Soften the remaining coffee ice cream for 10 minutes or so. Remove the pie from the freezer and spread the ice cream on the pie. Cover with Saran Wrap and freeze for 2 hours.
Remove the pie from the freezer and top with Cool Whip. Sprinkle the remaining crushed Oreos on top. Cover with Saran Wrap and freeze for 2 hours.
Cut the pie into pieces and drizzle with chocolate sauce.