If you have a dusty Samsung Galaxy Tab 3, an old Moto G, or a cheap car head unit running KitKat, you aren't stranded. You are sitting on a goldmine of DRM-free, lightweight classics.
Enable "Airplane Mode" before launching the game. Then turn Wi-Fi back on (or leave it off). This bypasses the "Sign in to Google Play" pop-up for many legacy titles like Vector , BADLAND , or Machinarium .