The term "APK" refers to the file format used for Android Package Files, which are used to distribute and install application software on Android devices. A portable version of "Cadillacs and Dinosaurs" with an APK file would allow Android users to play the game on their devices without the need for an emulator or a PC.
A critical feature for mobile gaming is the ability to save your progress at any point and resume later, which was not available in the original arcade Classic Dino Cadillacs Lite on Google Play. cadillacs and dinosaurs 20 gun apk portable