A new study found that gamers are more likely to experience lucid dreams: Video games change the way you dream.

Some select quotes:

"The major parallel between gaming and dreaming is that, in both instances, you're in an alternate reality, whether a biological construct or a technological one," [...] "It's interesting to think about how these alternate realities translate to waking consciousness, when you are actually reacting to inputs from the real world."
[...] found that during lucid dreams, gamers had control only over themselves as a character. But, much like in a game, they were also able to toggle between first and third-person point-of-view. "Gamers already know what it's like to be in control in an alternate reality," [...] "So it makes sense that a gamer would notice, ‘hey, I'm in a dream,' and know how to manipulate that situation."
[...] heavy gamers seem to be non-plussed by dreams that would qualify as nightmares — namely, those that present frightening or threatening situations. In fact, gamers seem to readily take control over (and even enjoy) such unpleasant nighttime illusions. In other words, while a non-gaming person might wake up in a cold sweat, a gamer would simply carry on with their slumber.
So... how do we script a game to help in the search for lucidity?

Perhaps as the game character runs low on hit points, subtle oddities could occasionally pop up; six fingers on a hand, a watch that skips time or text on a poster in the background that doesn't make sense. If you notice them in time, and you should only have a second to respond (like fishing in Minecraft), you get to enter an avatar state for a bit. Imagine if almost anyone playing it starts having lucid dreams!