About Riven - some guys are recreating it on a modern game engine (Unreal, I believe). Some of the things they did are quite nice... The project is called RealRiven.
If you didn't know already, you can also explore Myst V Ages on Complete Chronicles, though they are quite buggy (see the wiki about this).
I also did a remake of Mechanical some time ago...
http://forum.guildofwriters.org/viewtopic.php?f=7&t=6026As I said on other topics, this project is suspended, because the map I used to create the fortress wasn't accurate, and the interior wouldn't fit in the fortress.
I might resume work on it someday...
Christopher wrote:Sorry to say this, but if you are not going to do it yourself I doubt that someone else is doing it... The most age builder are working on their own projects...
This is unfortunately true. We're not a lot here, and even fewer people actually build Ages.
Personally, I simply prefer to play the game again, instead of visiting newest versions in realtime 3D that probably wouldn't look as good.