您可以使用的谷歌播放计费。根据哪些用户已买了所有的模块开发你的游戏，并启用/禁用模块。为了做到这一点的验证，注册产品的为您的应用程序，重新presents模块

You can do this with the Google Play Billing. Develop your game with all the modules and enable/disable the modules according to what the user has bought. In order to do this verification, register products for your app that represents the module