Im only new to the FPS games. I know a lot of ppl will get pissed at me for doing this but i need to if i have any chance of getting anywhere. I have played for almost 40 hours and im only on level 4. I was wondering whats the best gun to use as im only on level 4 and im finding it hard to level up. Is there any codes or cheats i can put in so i level up faster or unlock better guns? I need your help PLEASE.