https://www.pcgamer.com/valve-blocks-rape-day-from-steam/

Valve will not distribute Rape Day, a disturbing pornographic visual novel in which players "verbally harass, kill, and rape women." 

"Much of our policy around what we distribute is, and must be, reactionary—we simply have to wait and see what comes to us via Steam Direct," writes Valve's Erik Johnson in a statement. "We then have to make a judgement call about any risk it puts to Valve, our developer partners, or our customers. After significant fact-finding and discussion, we think 'Rape Day' poses unknown costs and risks and therefore won't be on Steam."