Surely combining elements from other realms will occasionally provide for unique experiences that may very well be worth the money but if you truly want gaming to develope and make a stand on its own then there has to be this genuine core radiator based in what specifies the genre - which, as is case for gaming, revolves around the deep rate of interactivity endowed.
The sense that you can in fact affect your surroundings even from real-time perspectives adds up great practice in taking responsibility, often by seeing its adherents act out in the opposite direction... Who cares- it's just practice anyway. Contrasting how litterature will only convey you the long-term takes at life.
Many great gaming works, especially from the early 90s, often have forms of written depictions integrated- hence siding with litterature to make this interactive world's details or briefing more tangible to a human mind, similar to how we have commentators in sports; we just need someone to hold our hand, after that, we can do anything.