Ludum Dare Rating System

Suppose a person opens your game page...
If that person awards you any stars or writes feedback, then their C score increases by 1, and your R score increases by 1.

Leaving a category N/A means this person is not scoring your game in that category. It doesn't not count as zero.

Then D for both users is updated with the following computation:

D = 50 + R - 5*sqrt(min(C,100))

The games are sorted by their D score, such that those with the lowest D scores appear on the front page in the "Play and Rate Games" list.

Then the rating stage closes.

Because of the use of N/A, each category your game is rated on will have a number of ratings less-than-or-equal-to your R score.

In each category, your highest rating is removed (eg, one 5 star rating, if you have any 5 star ratings.)
In each category, your lowest rating is removed (eg, one 1 star rating, if you have any 1 star ratings.)

If the total number of ratings in a category is less-than 15 (after these two removals), then you don't get an average score computed.
If the total number of ratings in a category is greater-than-or-equal-to 15 (after these two removals), then these numbers are averaged together (mean) and rounded to two decimal places (x.xx) and that becomes your score in that category.