Medieval II fell quite a few spaces mostly due to just rearranging my list. It's still a great game despite the age and there's a lot of neat mods out there like the Third Age Mod which allows you to take control of a faction from Middle Earth.
Anyways now onto #48.
The series, which this game is a part of, is named after a natural rock formation in Central Europe. However in the series, the name refers to a castle. The castle itself is not actually present in this game but it is featured in the prequel.