I'd post the evil and horrific aspects of D&D roleplaying us that its heroes face in the simulation genre game we will eventually create, but it suffices to paraphrase.
βWhoever fights monsters should see to it that in the process he does not become a monster. And if you gaze long enough into an abyss, the abyss will gaze back into you.β ~ Friedrich Nietzsche
In Latin it is abyssus abbysum invocat, one abyss begets another. But heroes win in the end despite casualties by not becoming the monsters they fight.