Allows you to play forever, time never stops.
Configuration file: eternalgame
Command line: -Xe
Normally, the game will never go past the year 2070. On December 31, 2070, the following day is again January 1, 2070.
With this switch, that will not happen, and instead time will continue running, and you can keep playing the game virtually forever, although in many places the year will seem to stop at 65535 (if you have enough patience to play for that long...).