Other way around. The idea is that anybody can right-click-save whatever game they like. But when you run the game, the first thing it would do is check your blockchain wallets for authorization to execute this game.

Basically, accept that your game media will be copied willy-nilly and do a "does the user actually have ownership rights to this" check that is already common today, except that do this check against the blockchain so that there isn't a single-point-of-failure by putting all reliance on the vendor's auth servers.