When video games were first started they were fairly simple affairs. The story lines were basic and there wasn’t much history or backstory involved. All you knew was Bowser stole Princess Peach and Mario needed to rescue her. But as time has progressed, games have become more sophisticated to have more complex stories within them.
One need only look at a story such as Halo which came as a new type of FPS. It started out as a simple shooter with a good strong storyline. As time has progressed it has a ton of lore that goes back thousands of years and involves many different alien species. There have been books, comics, live action films and even animes made for the game. The lore goes very deep and that is only one game that’s an FPS which typically don’t have a deep history.
Other games which would fall into the RPG or MMO category such as Fallout, Skyrim, Dragon Age, or the Witcher have even more in-depth worlds. There’s entire histories, characters, and pieces that you might never discover without devoting weeks to playing the totality of the game. And it seems as time goes on that games are getting to be more robust within the narratives that they tell. As technology improves so does our ability to tell stories and expand on these fictional worlds. Wikis and other forms of encyclopedias offer the opportunity to expand these worlds to have a history as rich as our own.