UDK is Unreal Engine 3 – the complete professional development framework. All the tools you need to create great games, advanced visualizations and detailed 3D simulations. The best tools in the industry are in your hands.
As part of my tutorial on the UDK forums, see description for links.
As part of my tutorial here: Forums.epicgames.com
It's a basic setup for Topdown camera code in UDK, made with the UDK June 2011 build
This should help everyone get started on topdown UDK games and it should serve as a solid base for Isometric viewpoint games as well.