How about a game where the object is to get the highest score with a certain victory type instead of the earliest finish?
All scores are a sum of 4 components weighted as follows:
* 50% based on population of all your cities
* 20% based on land area within your cultural borders
* 20% based on technology you have researched
* 10% based on wonders you have built
The final Score is also weighted by the Win date. The earlier the Win date is the higher the Score multiplier will be and thus the higher the final Score might potentially be.
The largest component of Score is Population and Land is a significant portion. So, what is the quickest way to increase Population and Land? Conquer it, get scores of Happiness and Health Resources, research Biology and Build Farms, Build Food focused Corporations like Sid's Sushi or Cereal Mills. So, essentially the top three will start an early Rush, stopping short of Domination. Research like crazy, since that also adds significantly to Score. Building Wonders is probably not worthwhile, since its only 10% of one's Score; it would be a distraction from being more effective at gaining Population, Land and Technology.
Well, the above is the Strategy for a pure Score Gauntlet where any Victory Condition counts. Requiring a specific Victory Condition would probably amount to a variation on this Basic Strategy by merging in tasks that must be achieved to attain the required Victory Condition. If the required Victory Condition was Conquest or Domination, the variation of the Basic Strategy would be too minor to be significantly interesting. That leaves us with Religious Leader Diplomatic Victory, UN Diplomatic Victory, Cultural Victory, Space Colony Victory and Space Race Victory. Only the two Diplomatic Victories would be significantly challenging, for how does one conquer several Civs without making the rest too mad to vote for your Diplomatic Victory. The others would still be quite interesting; would be nice to see whether a 1,000,000+ Score is possible in Winning a Cultural Victory which normally Scores quite low.
So, I'd agree that such a Gauntlet would be quite interesting.
Unfortunately, Score games always involve milking the Score until one can't gain enough Raw Score to compensate for the loss in the (potential) final Score due to a later Win date. This makes the end-game of Score measured Games quite tedious, if not (quite, somewhat, very, or extremely) boring. Sorry, my lack of enthusiasm for Score Games is showing. But don't let that stop you from enjoying them; even I like to play the occasional one after playing a few dozen (early) Date Games in a row.
Specifying a specific Victory Condition with Score would definitely be a far more interesting Game then just a Score Game where any Victory Condition is acceptable.
Sun Tzu Wu