Science always uses 3 significant figures. You calculate to four significant figures to avoid rounding error and then you round your answer to 3 significant figures. Obviously.
It gives a 1,000 scale.
You're rating a game, there's no need to over complicate it.
0/10
1/10
2/10
3/10
4/10
5/10
6/10
7/10
8/10
9/10
10/10
Just use this rating like any normal person would.
... At least 2 significant figures? Please? I feel naked saying something's either perfect (4/10) or terrible (3/10)
What if half of the mechanics are broken but the other half are functional?? What if it's 30% dysfunctional?? What about 34.6% dysfunctional!!? Oh my God I'm having heart palpitations, help me! O_O