Data: 7, 2, 0, 2, 10, 20
The standard deviation is not a measure of center.
I would use the mean because it considers all data. The mean for this case is:
(7 + 2 + 0 + 2 + 10 + 20)/6 = 6.83
The mode is 2 and the median is (2+7)/2 = 4.5. These figures don't give the importance that the two best games have.