You have to root and use Chainfire3d using the nvidia plugin when set to 7500 since that tab uses a nvidia CPU. That's how I got mine to work.
I also have backstab, modern combat 3, and a bunch more working this way
Also, modern combat 3 with the sixaxis app using my ps3 controller is amazing. Worth the price of rooting. I'll pm anyone the mapping file for MC3, gta 3, and shadow gun.