Myst Uru: The Path of the Shell requires the full version of Uru: Ages Beyond Myst

    * Supported OS: Windows® 98SE/2000/ME/XP (only)
    * Processor: 800 MHz Pentium® III or AMD Athlon™ or better
    * RAM: 256 MB RAM or more
    * Video Card: 32 MB DirectX® 8.1-compliant video card (see supported list**)
    * Sound Card: DirectX 8.1-complaint sound card
    * DirectX Version: DirectX 8.1 (included on disc)
    * CD-ROM: 4x or faster
    * Hard Drive Space: 2.5 GB free hard disk space
    * Peripherals Supported: Mouse, keyboard
    * Display: 800x600 16-bit display

** Supported Video Cards: 32 MB NVIDIA® GeForce™ 1,2,3,4, or FX; ATI® Radeon™ 7000-9800 or better; Intel Extreme video chipset is supported

...
- it needs to go through compatibility testing, but we've potentially
drastically reduced the video card requirement.  I might get in trouble for
saying even that much yet before it's confirmed.  I just want you to know
that when/if that's announced, it's a big deal.

Bill