To represent such a data relationship in a chart, you can draw a two-tiered pie chart.
First: Prepare the data before drawing, and unify the data of different levels into the data under the same level statistic, as shown in the following figure:
Then: Copy this column of data into two columns, and through these two columns of data, create a pie chart that contains two series of data, as shown in the following illustration:
Select one of the series in the chart and draw it on the secondary axis:
Separate the selected series as a whole:
Then select each detached sector individually, then resize the detach to 0 (you can move to the center direction with the mouse selected sector):
Select the lower layer of the pie chart (larger pie) with several sectors corresponding to the game category, set the sector fill and border color to no fill, wireless bar, and hide the display of these sectors:
If you want to embody the integrity of a double layer pie chart, you can remove some of the shadow and gradient effects. For better appearance, you can also adjust the angle of rotation of the pie chart. The results of the final completion are as follows: