Preheat oven to 350 degrees.
In a greased 9x13 inch baking dish, combine crushed graham crackers, 1/4 cup sugar, and 6 tbsp melted butter. Incorporate all ingredients by hand and press down evenly. Bake for 9-10 mins and set aside to cool.
In a small saucepan melt caramels and evaporated milk over low heat, stirring continuously until smooth. Pour over crust.
In a medium size bowl toss together apples, 2 tbsp sugar, cinnamon and nutmeg. Spoon mixture over caramel layer.
Using a stand or hand mixer,cream together cream cheese and 1/2 cup sugar. Add vanilla and eggs, (1 at a time) scraping bowl after mixing each egg. Mix slowly until smooth and creamy. Pour filling over apples evenly, using a flat spatula.
In a large bowl combine rolled oats, brown sugar, and flour. Cut in butter using a pastry cutter or fingers until mixture resembles coarse crumbs.Sprinkle over cheesecake filling.
Bake at 350 degrees for 45-50 mins until center is set and top is golden brown. Cool at room temp for 2-4 hrs and then chill in fridge overnight or at least 4 hours Do not cover until chilled or else topping will get soggy. Enjoy!