Please follow all the instructions carefully :
- Root your Samsung Galaxy Y using THIS tutorial
- Download all these FILES
- Install .apk
- Extraxt gangster.rar file and place it in the folder SD card/gameloft/games/
- Install Chainfire 3d and open it and then install CF3D driver once and then go 'install plugins / shaders' then install the three plug-ins powervr.zip, qualcomm.zip and nvidia.zip(thease are the three plugins download it from the above link and move them to sd card)
- now in chainfire 3D go to 'Default OpenGL settings' tick on 'Reduce texture quality' and then go to 'use plugin'(in open gl settings) and choose 'qualcomm'.
- Open and play the Game