My experience and what some others have told me: permanently freeranging flocks, of even active competition fighters, can form peaceable existence with enough room for them to claim their own territories. And have heard of one cocker who conditioned cocks in fairly close proximity by discing boundaries.My thoughts:
If "extremely game" means that the males fight each other, and kill each other if given a chance, then it sounds like a nuisance to manage them. Roosters that will just spread apart and co-exist on free range would make management easier.
I can see why you want all the other traits, and I hope it works for you. Sounds like a neat project!
The KEY is that a even a crazy game rooster does not want to leave his hens and risk losing them. A more natural order and behavior ensues.
A commonly referred to danger, especially when stags are almost grown, is they get rained on and don't recognize each other. This possibly endangers the boss male as well.