Be mindful of the machine that is in your posession there...
Asus gaming laptops (for the last couple or so years) have been manufactured in with something called "Optimus Technology."
Optimus Technology laptops are build in with two graphics cards; one from intel, the other from Nvidia or whoever they are contracted with. Basically there are two cards in your system, one with high graphics, one with low.
The reason being is in this technology itself. Optimus Technology is programmed to automatically detect and switch to the appropriate graphics card, depending on the call of the task or process. The reason for this oddity is so you don't constantly have an energy guzzling, high end graphics card wasting your battery where you are just looking at your email or sitting idle.
Now to answer your questions about the drivers. Don't touch them or mess with them. Asus will post any updates necessary for your system. If you are real eager to update it though, at least start back at the bottom with the initial drivers that came with it. Then you go to nVidia's website and download and install something called GForce Experience. That will keep track of what updates are going down with your nvidia driver. Trust me, I found it to work alot better than manually downloading the driver exe. However, some of these asus laptops with this technology tend to blue screen upon updating the nVidia card. To fix this, you will have to manually download your original driver off the asus website and ONLY install that driver on safe mode. Then you will have to go to nVidia's site and manually download the updated driver, then get back on safe mode to install that as well. This is what happend to my last Asus that had all this. It was an N53SN..... But anyways..... I have the G750JM now, much better.
BUT WAIT! you must make sure you didn't mess with your intel drivers as well! If you did, make sure you go to the Asus site and get it back and install it. NEVER worry about updating this one at all, just leave it alone.
Now for your game, if you haven't gone to the game options yet, you are a moron, BUT if you have, you go to the nVidia card options called nVidia Control Panel. In there you will have to go to the 3D settings and in there you can set your options of preferred graphics card and what not, I take it you are smart enough to figure all this out. Big tip! if you don't know it, don't touch it, google it until you know it, don't guess.
Now if that doesn't work, check your game files to see if there are directx, opengl, and safemode versions of the game exe. Don't touch the safemode version, try directx (dx) first, if that doesn't work then try opengl.
Now if all that doesn't work still, uninstall the game, and go to where it's directory was and make sure all files of the game are gone. Even sometimes the game will have a directory in your documents somewhere to keep setting information. You have to make sure all that is gone. Then reinstall.
If that doesn't work, then idk what to tell you, you are SOL. You broke a great computer, idk how, but this laptop is the **bleep**.