It seems to me that only the most dedicated gamers would play any of the Rhem games. These games are probably the most fiendishly difficult in the entire genre, which also means that Kurt is probably the most creative and imaginative of all the developers.
One quirky feature that definitely applies to Rhem 4 (and to the others also, as I recall) is the compass. When looking north, left is east and right is west. Unless I'm misinterpreting, this seems completely counterintuitive. Any thoughts?