There are many types of games, Gamefowl like the Americans, and Orientals (Shamo, Asil, Thai, Brazilian, etc) will fight once they reach maturity and there is no stopping this unless you breed them with non-game breeds and even then it can sometimes be quite hard to breed the gameness out. Chinese games have been said to still be game even with crossed with other birds. They're generally tame to people, but like all breeds you can get that one.. I've grown up around games as they have been around my family for four generations, and i have only experienced 12 mean roosters in my life time.
You may get the large Old English Games from the US, or the Old english bantams and moderns and have no problems with this, but just because they will fight doesn't necessarily mean you should pass them over if you like them.. It's part of what makes them so special in my opinion, and separates them from the other breeds. If they were just pretty like others then why not just raise the others? The game is what gives them the attitude that attracts so many people towards them, im not talking about fighting attitude. But the pride that comes along with it.. There are quite a few videos of Gamefowl on youtube that do not involve fighting, but yes since it is open to everyone from around the world Youtube does have fighting videos from places where it is legal to do so.