Your examples are all AAA titles, where the expectation is one of voice acting and highly polished animations, etc.  It&#x27;s pretty difficult branch plot lines when you carry such a high cost of production.  Perhaps one day, computers will be able to improvise voice acting, plot lines and art.  Until then, if we want any semblance of real openness, we have to stick to relatively low-cost of production &#x2F; algorithmic &#x2F; generated content, like Minecraft, Dwarf Fortress, No Man&#x27;s Sky, etc.  These games are all limited in many ways, but at least use the player&#x27;s imagination to fill in the gaps in creative ways.