Rudi's D gets by more on its imagery than the way it plays. It is, at most times, a little inhospitable to human habitation. The map may begin with a set of steps leading up to the imposing monolithic cuboid you'll be ascending, but this is a trick, it is not a place of honour and it is not for you. The first impression, a mass of stone caught in the moonlight, looming over you and surrounded by a field of sub-cuboids, is dead on.