pleas nairalanders I need a little help.

I downloaded modern combat 2 black pegasus for my gionee pioneer p3 and I downloaded the data which was zipped and o unzipped with 7zipper and now when I want to launch the game it will be saying its not an original copy. I downloaded another apk and its saying not compatible. after downloading the third one its saying it needs additional files to play and after using network. its not successful . please what should I do.