To make the crust, start by crushing the Oreo cookies very well. Add in the melted butter and mix well until incorporated.
Spread the crust in a baking dish and make sure it is well grounded. Chill the crust for at least 1 hour.
To make the filling, in a bowl, add in the cream cheese, unsalted butter, sugar, vanilla and mix well until fluffy. Add in the Oreo cookies and mix.
Spread the filling over the chilled crust and refrigerate until you finish the topping.
To make the topping, add the chocolate chips to well melted butter and mix well till all is dissolved.
Spread the topping over the pie and refrigerate for at least 6 hours before serving!