1869 is an 18xx-series game set in the western US, combining the 2D stock-market of 1830 with the an 1835-style fixed company opening order, wherein each 'group' of companies must be sold out before the shares of the next may be bought. 1869 also features one shares of variable sizes depending on the corporation, an idea obviously descended from Moon's 'Reading Variant' for 1830. There are also 'bonus runs' for some of the companies, which provides them with additional money for running trains between given cities.
1869 by Alan Moon is a game that is unlikely to see the light of day in published form, especially given its long (even for an 18xx game) play time. However, there are several copies of it circulating, and is played by (e-)mail by several groups.
UPDATE: As of July, 2014 this game is available direct (from Germany) via Marflow Games.