Whatever your playstyle and however you like to play the game doesn't really matter. You will play the game how you want to play it regardless of how others play it.

There are no supported cheat codes as it was mentioned earlier the game was primarily developed for multi-player so there is no 'single player special functionality'.

If you feel the game might interest you but cannot decide if you want to purchase it because there are no cheat codes, and that is a hard and fast rule for you, more than likely you will not purchase it, much to your loss. If you feel it has enough interest for you to play the Demo more to see if it is worth it even if there are no cheat codes, you will more than likely find the game is worth the money you spend on it, even lacking your prefered playing tools.