Well, if you are looking to buy game breeds, in my experience hatcheries are not the way to go. I have had "game" breeds from hatcheries, and they were anything but pure... The hard part about raising games, is having space to raise them. That is why hatcheries can't offer good stock. As others have said, they have to concentrate on quantity, and with games, you just can't do that unless you have a big ol pole barn full of separate breeding pens...he he. Anyway, if you do get some that look like they are supposed to, but are not game, they aren't what they are supposed to be, so you still don't have pure ones. As for keeping game birds, all I can say is buy good stock from a reputable breeder, and start building pens now, and plan on building 10 times as many as you think if you plan on breeding them!
