The goal of the game is to build the most successful Underground lines and in doing so gain the most points. You can gain points by connecting your lines to various destinations on the board, and by having the passenger use your lines to travel from station to station.
The player who has best balanced the demands by the time that the deck of destinations is exhausted will be declared the winner.
The author's original web site hosting the FAQ expired, and the Internet Archive had never captured it, but I was able to retrieve it from Google's cache of the site. I formatted it for print readability and have shared it so that it is not lost to time.
This file contains the author's 2-page FAQ, as well as 1 page of variants from the site. This information is copyrighted by the author, except as acknowledged within.
Total of 3 pages.