I wish more games had an organic research process - by which I mean I wish more games had non-obvious lore to read up on which reveals a crucial strategic detail about an enemy, but it's not as simple as just looking up "weaknesses" in an automatically filled out enemy guide or scanner or whatever.
My go to example here, although this isn't consistently the case (which I'd say helps the effect) is [yet again] Divinity Original Sin 2; there's a book you can read which happens to obliquely mention the weakness of trolls in a passing line out of a few pages of writing. Although it's not required to beat them, it does make things a lot easier, and it feels entirely like how a medieval world might work; hearsay, unmarked info lying around among a lot of chaff, but for the discerning player who takes notes, can be used to great effect. It's not highlighted, it's not put in your journal or whatever, it's entirely about the agency of the player. More of this.