in-game is in-engine
Not necessarily, at least not unless you're willing to argue that cinematics are somehow not a part of the game. (at this point I would also like to pre-emptively point out there is a difference between in-game and in-
gameplay)
As for lying, what would be the point?
Why do people lie, hm. Well generally I'd say to gain an advantage they couldn't otherwise obtain.
They have 9 months to go, hyping too much now would be a very bad idea, expectations are going to be insanely high as it is.
And yet they keep throwing more and more stuff out, interviews, videos, even a bloody feature on how the sounds were made, and who's interested in
that? Clearly they disagree with you and think hyping as much as possible right now is a good idea.
To be fair, you wouldn't exactly like it if the roaches decided to dig up your family members and use their soul to become as powerful as you. As much as the heart could have helped all sentient life it was a lot like messing with nuclear weapons while knowing that the current theories on it suggest the atmosphere could light afire.
Yeah, but that's exactly why it bugs me. We're humans, taking risks and pushing boundaries is what we do, what we've always done, and that's why I admire the dwemer so much. They were the only race in the TES universe with truly human spirit. They knew perfectly well the Daedra didn't want them messing with the heart but they did it anyway. As The Definitive Guide to Dwemer puts it, they were atheists in a world where gods actually exist. They had massive balls made of solid brass, and that's why I love them.
And in each one of those there was a robot with a sword for an arm.