Finally, I know of a walkthrough, for Rhem 1, that leaves very little to get upset about. After playing part way through several times and making crude maps and taking notes, each time I can progress a little farther. The most difficult part is trying to describe the puzzles without pictures. I've been playing and replaying portions, for the last week, and am almost half way through. Actually losing sleep every night or two. I shudder to think what Rhem 2, 3, and 4 will be like.
I highly recommend the Rhem series. Quite similar to the Myst series.
By the way, one person made the Rhem series.