The Pandorabots Python SDK by Pandorabots communicates with the API to integrate bots into chats, messaging, and games applications. Code shows how to create a bot, compile a bot, and talk to a bot. Documentation available.
Google has long fielded complaints of sign-in requirements associated with Google Play Games. The Google+ requirement and multiple sign-ins required for multiple games has been a hotbed of frustration. Google announced the end of both requirements as part of a Google Play Games API model change.
Late last year Google discontinued active development of the company’s smartphone-based VR platform: Google Cardboard. At that time, the announcement was made that Google would open-source the project, an olive branch for developers hoping to continue improving the product.