I've recently realised that I can download games that I would normally pay for off of the Google play store with .apk files, so I tried it, went along with walk-throughs on the internet to download them. So I copy the .obb folder for the game into my \Android\obb folder and like the walkthrough said, I then put the .apk file into the same folder that the .obb file is in. I then install the game using the .apk file, and the app installs correctly, and opens fine. I get to the game menu, and if even if I stay on the menu, the game still works fine, but after starting up a level in the game it crashes. The level usually works for about 5 seconds and then just freezes and the whole phone locks up so I have to turn it off. While reading through the comments on the walkthrough, someone said that if the game crashes, I should move the .apk file to a different folder and then run the game. I did exactly that, I even deleted and reinstalled it after moving the .apk file, but the same problem happens again. I've tried it for 2 games now, and it's always the same, the games were Rayman Jungle Run and Carmageddon. I haven't tried installing any other apps the same way. Can anyone help me with this problem?