So I looked into this, as I wanted to make Dead Trigger 1 which is also sideloaded on my OUYA, appear in the play menu as you have done with this mod for Dead Trigger 2. I successfully unpacked the apk, made the required manifest change, added an OUYA image, repackaged, and signed it. The game now appears in the play section, but after launching the game, it exits shortly after the loading screen appears. Why would this be happening? I tried unpacking and repacking the obb file so I could apply the same license to it, but that resulted in Dead Trigger telling me there was a problem with the data file for the game. Any suggestions? Am I missing a step? This is the first time I have worked with APK files, so I am probably just missing something.Sure! Look about halfway down the page on here where it says "Developing with the ODK"
Thanks!