Also look at two other adventure games by the same developer:
Chronicles of Mystery: The Scorpio Ritual
Chronicles of Mystery: The Tree of Life
They have a different heroine, but the games play much the same.
Someone else will have to say whether the versions on Big Fish are "abridged" or not.
Those 2 games were also packaged on a single DVD under the title Ultimate Mystery Collection, and I think it is also available on Amazon.
I can't speak for the Big Fish versions, but I do have both of the DVD collections that I got from Dave Sparks at Interact before he closed, and they are both the original unabridged versions.