Google Play Games PC is a gaming store for Windows devices that offers access to a wide range of Android apps. Google is so serious about this offering that it brings 4K support, controller connectivity and even offers PC gaming. Most recently, a feature that I've never seen people ask for has been introduced which is playing two games at once.
Google has already introduced cross-platform support where playing in Play Games PC on a computer can then continue playing on a smartphone or tablet. The feature of playing two games simultaneously according to Google allows users to compete and fight seriously in one game while the other is for games that require monitoring. Usually this feature is limited to Android tablets or folding screen phones only.
This feature will be rolled out to all users in an update soon. For those who have been waiting for this feature you can finally enjoy it for free and officially.