Something that totally shocked you learning it or realizing it. I might be using the wrong wording here, but ill give you my example:
In Ocarina of Time, we all know the Triforce was cut, or otherwise not something you get in the game, save for in the cutscenes towards the end. BUT - did you know you can actually go find it and see it in the game?
If you have a Gameshark, turn on the levitation code. Go go Zeldas Cortyard in the room where she is, and fly over the wall. When you fall, you’ll land in a pool of invisible water, and underneath the center of the room with the flowers, look down - there it is. Can’t interact with it, but you can see it, and i choose to believe putting it in that exact spot was intentional for lore reasons.
What do you got?
The Tribes games are actually in the same continuity as the earthsiege/starsiege/cyberstorm mech pilot series.
Every TES game has you smash, vanish, or otherwise mess up one of the key structures of reality in the world as the goal of the game. None of them can be truly destroyed but at this point things gotta be looking bad.
The indie game called Heaven’s Vault has your characters foster mother as a primary antagonist and a religious fanatic but the Ng+ implies she might be right about everything.
Pretty much all the archaeology of Elden ring and the fact that even the earliest civilisation visible might not have been the first.
A big part of the Elden Ring lore is there are aliens and I feel like people don’t make a big enough deal about that
The TES stuff is my jam. As much as I don’t really care for Bethesda now, I appreciate that even up through Skyrim, a lot of the wilder lore tidbits are acknowledged and hinted at, just never put at the forefront. The Empire having asteroid colonies and spaceships, Dwemer steam trains, genocidal time traveling cyborgs in Oblivion, etc.
Love the sub canon about what the eye of Magnus actually is. It’s so, so dumb I can’t help but like it.