It's a mystery to us players.  This is the 3rd thread I've seen asking the same question.  I've been playing on normal with small and medium maps so that I could complete games between beta updates, and I've been getting scores in the low teens, with culture, alliance, and military victories.  Yet someone on the metaverse has a 4000 point game on normal difficulty.

I think that the number of turns are integrated into the scoring formulae as a divisor of the accumulated score, and functions as an increasingly depreciation of every turns score as long as additional turns are added.

Perhaps in a way like 

(SumOfScoreTurn1/Nt) + (SumOfScoreTurn2/Nt) etc = TotalScore

Nt being the number of turns that have been played.

A Turn1Score of 100 would deliver 100 points to the TotalScore if the game is ended on Turn1. If ended on Turn2 it would deliver 50 points, or only 10 points on Turn10.

However as long as this depreciation could be overcome by the collection of additional score each turn the TotalScore will rise, although this becomes increasingly difficult the more turns are added. As a rule of thumb as long as you can still maximize one or more of the different increments that attribute to the sum of each turns score (population, military ships etc) the score should also rise.

According to the metaverse, the 4000+ normal difficulty large map influence win was on turn 1.  At best this was via some huge exploit, at worst a cheat of some kind.

At any rate, I'm going to ignore the metaverse and just enjoy playing the game in my own style.

when i first played the "tutorial" map i got about 15 points. i replayed that recently for no particular reason other than "fooling around". i basically grabbed the 2 planets that are not yet settled, built them up as efficiently as i could and made my way through the tech tree fairly quickly (i think i had most of the techs unlocked around turn ~200, which i think is decent for only 3 planets). to finish the map, i built a couple of giant ships with the final tier of weapons and defenses (complete overkill ) and finished the map. the result was 600+ points. so my guess would be it's based on tech progress, military and economic power vs. the turn number. map size could also be a factor.

In the two games I've played (both on 'Large' maps) in both of them I led commandingly the whole way, and received scores of 19 & 9.

Score most defiantly need another look.  Paul agreed on the stream.  When?  1.1 hopfully

• Gigantic map
• 8 majors on normal against me (custom race)
• 535 turns
• Conquest Victory
• 2,858 billion people
• 176 planets/200+ starbases/500+ ships (maybe 700ish)

Score: 523

No idea how that's calculated, obviously playing on godlike should result in a better score.