Let's not forget: Developers are gamers, too.
That love of games easily overcomes any business competitiveness, as evidenced by the sudden cold that ripped through CD Projekt Red's offices when Fallout 4 launched.
Senior Technical Artist José Teixeira told GameReactor that during launch week for the well-received Fallout 4 , "there were a lot of 'colds' in the studio." He added that despite the "rivalry" between CD Projekt Red and Bethesda, they all admit that the latter team "makes absolutely great games" and Teixeira added that "everything they do serves as inspiration for us, although we hope the opposite is also true." Respect, yes? As Teixeira clarified:
"Here in the studio we are all major gamers, and although each one has their preferences, almost everyone loves RPGs. I think this rivalry between the two studios ultimately benefits both the players, and the studios themselves, forcing us to always do better."
Personally, I think The Witcher 3: Wild Hunt at its best (i.e., after the many fixes and improvements) is a better game than Fallout 4 but that's me.