This is a UDK experimental level design.  This is a snow fortress that was made in UDK and static meshes made in Maya.  I created the snow particle effect in UDK Kismet, as well as the portcullis animation.   The textures of the map were created in Photoshop and the castle, gravestones, throne room, and the dining hall were all made in Maya.  Trees were created in SpeedTree.