Well, that's from an earlier version of the video game concept, when the Machines were simpler and more child-like. But yes, in-game documents would be a big part of the game. Hell, I think it would be hilarious if you could actually find whole episodes of, say, The Simpsons, as files, and trade them like currency.
But yeah, there'd be lots of universe-building stuff lying around. That's the primary way the broad-strokes background would be explored, sort of like Deus Ex; snippets of news broadcasts, old newspapers, archived bits of the internet, that sort of thing.
I'm working on laying out the progression of player knowledge, Since the themes are all about growing up and learning the hard truths, but also viewing things with a fresh, innocent perspective instead of cleaving to preconceived notions.
In the beginning, the player is supposed to assume this is a standard Terminator situation. Then you find out about the good robots. Then you find more and more pre-loss stuff, that doesn't mention anything about robot uprisings, just a MGS4-type War Economy going down the tubes. Then you find out that Network went crazy and omnicidal way AFTER the war. Then you find out that the human rebels are led by a genocidal jackass who serves some mysterious master. Then you find out that you were supposed to be a leashed anti-machine weapon, created by the rebels. Then you find out that Network and you are brothers, and there's still something that can be saved inside its mainframe.
The moral of the story is that no one is completely good or completely evil, and what matters is seeing the world with fresh eyes, all the time.
That "humanity" or "soul," or whatever you want to call it, has nothing to do with 46 chromosomes, or even blood and bone. The robots are humanity's neglected children, and they're in the process of growing up.