To get the information for all the categories of webmaster games you need to get the contents of this url

This example is using the EN locale but you can change this to US, PT etc.

This will return the game infomation avaliable for that country.



This is just an exmaple of the type of response you will get:

Now you can loop through all of these categories and using the ID, you can get all the games for the category.

This is shown here.