Where does the driver come from, in the supply chain? I mean, is it the game devs that put it in? Is it the anti-cheat software they buy from a vendor? If so, w

Where does the driver come from, in the supply chain? I mean, is it the game devs that put it in? Is it the anti-cheat software they buy from a vendor? If so, who develops that and how did the driver get into it? It would be good to know at what stage it was injected.