Heya there,
It's a possibility in the future--perhaps once Chapter Two is done and I sell them both in some kind of bundle deal. I have a Steam account all set up for that stuff with a slot to put a game up, but I've been hesitant about it in case the game ends up being a bit too much for Steam or something.
Viewing post in Quest Failed - Chapter One comments
The worst that can hit you at all in steam is either a VAC ban (anti cheating system possibly shutting down account) or a copyright claim.
im pretty sure this kind of stuff can work there, and if not, well, one game named "succubus affection" had a nsfw patch outside of steam because the steam version was censored.
So, unless copy right claims or VAC does something, if the game gets through steam greenlight, it can be released.
Well, we just might have to see if Valve pulls a Valve Move.