Learned about Simulation Theory in an episode of Elementary last night, not that much really, but enough detail to forge a working construct.

Here's how I came up with Simulation Theory way back when or how I imagined we may be living in a giant computer program.

It's little more than the hubris of the present for anyone living at any given time to imagine their particular cultural codes are reflective of the afterlife, or a world beyond our own which somehow controls caprice and destiny. 

In school, when I heard that Hegel had decided that he was living in the most advanced state of being ever conceived by any particular culture throughout history, a state where he held a most prominent role, I was surprised to find even mild-mannered scholarly philosophers also had ambitious fashionable thoughts.

It's a natural tendency to intuitively presume seemingly miraculous technological developments hold supernatural secrets, or that advanced somewhat impenetrable philosophies also reify acute divinity. 

Thus, remember that in whatever time you live, with whatever profession you have, it is the most reflective of the ethereal unknown, and your occupation the most supernaturally conducive, should you want to prosper socially (Plato condemns despotism yet lauds philosopher kings in The Republic). 

Nevertheless, it looks like thoughts which suggest the material world is a computer program fall under Simulation Theory's umbrella.

Seems a bit farfetched to me.

Not that there aren't rather striking parallels.