This simply adds in more speed options, detailed below:
* Realist: Standard speed, but with 2.5× time for research and slower year progression (plus some other background adjustments).
* Realist Plus: As above, but using values closer to the default Marathon speed.
* Long Haul: starts at 6000 BCE, slightly faster year progression than the other two but uses values similar to Marathon for research etc.
* Extended: Similar to Realist, but does Horrible Math Things™ to the default years-to-turn values.
* Even More Extended: Like Extended, but EVEN LONGER
* One to One: Every turn is one year.
* One to Five: Every turn is five years
* One to Ten: Every turn is one decade
* One to Twenty: Every turn is two decades
* One to Forty: Every turn is four decades (this is identical to Standard, but the year to turn ratios don't ever change.)