Gor. , May 26, 2022 : Try clearing cache and data of package installer app and reboot. Try resetting app preferences and reboot. Make sure you have permissions enable to install apps/apk from unknown sources. You can try using the following link to install apks for this app. Start with trying to install the latest version, if it doesn't work, try the consequent older ones and see. https://www.apkmirror.com/apk/bravo-unicorn-pte-ltd/games-3/
Gor. , May 24, 2022 : Hey there, I hope the following is what you are trying to install because the older one is not meant for OxygenOS 12 or in your case for the 9RT which uses a more refined version of OS 11: https://play.google.com/store/apps/details?id=com.oplus.games
Gor. , May 26, 2022 : Try installing the following and see what happens, does it work? https://play.google.com/store/apps/details?id=com.oneplus.gamespace&hl=en&gl=US
Gor. , May 26, 2022 : As expected. Try all the suggestions mentioned in the following link and see if it helps: https://www.alphr.com/android-wont-download-install-apps/
Gor. , May 26, 2022 : Ah okay, please try performing a phone reset. It usually restores pre-installed apps so I hope it does the same in your case.
