Well people like to create there own games with the games rules like tdm. They will make games like prison, knife club, and lvl up, + many others. But you create your own character. Get him dressed up, choose his voice and others. You can use a codec to talk to other team mates. Then you have a part were you can chat like text. Then you can lvl up his skills. Example Blades 3 and CQC 1 will allow you to slit throats, Or CQC 3 will allow you to disarm a person of there gun. Pretty cool game. But there is many more features. If you want more info ill tell you more.

And if you want cheats there is a cheats topic on this board!