APK is an acronym for “Android application package”, which is an application installer used on the Android operating system. APK is a ZIP-based archive, based on the JAR format and has a .apk extension.
Users or programmers can also install APK files directly to the device without downloading through the network from personal computers, using a communication program such as the Android Debug Bridge (adb), or using The file manager in the process is called sideloading. By default, installation options from unofficial sources or direct installs on Android devices are disabled for security reasons. However, users can activate by changing the “Unknown sources” option in the system’s Settings section.
And below are the games that you can download and install from their APK file: