If you're looking for a plain chocolate cheesecake, you may want to look on my chocolate cheesecake page. Under chocolate cheesecakes is a recipe for Rich Chocolate Truffle Cheesecake. This is a plain chocolate cheesecake and there are others listed that have various ingredients in addition to chocolate for added flavor.
I have attached the recipe here for you to look at and see if it's something you may like to try.
Good luck and I hope this helps!
Rich Chocolate Truffle Cheesecake
Crust:
1 1/2 cups crushed oreo cookies
2 tablespoons melted butter or margarine
Combine crumbs and butter and press into the bottom of a 9 inch springform pan. Bake at 325 degrees for 10 minutes and allow to cool while preparing filling.
Filling:
3 packages cream cheese, softened
8 squares semi-sweet baking chocolate melted and slightly cooled
3 eggs
1 cup granulated sugar
1 teaspoon vanilla
Mix cream cheese, sugar and vanilla with an electric mixer on medium speed until well blended. Add melted chocolate and blend. Add eggs, one at a time, mixing on slow speed just until blended. Pour over cooled crust.
Bake at 325 degrees for 55-60 minutes or until center is almost set. Run a sharp knife around the rim of the pan to loosen the cake but don't remove the rim until cool. Refrigerate at least 4 hours before serving.