Typically, with the DX games, if you sneak around, you'll overhear conversations and by hacking, you'll get background contextual information. Talking to people usually nets useful info and backstory as well. That said, if you DON'T do those things and opt to slaughter everyone, you may not pick up as much backstory. There's usually datapads with information as well. So yeah, in a way, if you choose to handle yourself and become skilledin different areas, you might find information in a different way.