skeletonbow: I don't buy the "Steam censors games" argument, except in cases where a game would violate a country's laws in which case Steam isn't censoring anything, a video game developer is censoring their own product in order to meet a country's laws and then marketing their product through Steam.
As far as I'm aware the version of The Witcher 3: Wild Hunt on Steam is the exact same version available on GOG. For those who haven't played the game, it is very adult oriented in every possible definition of "adult oriented", including nudity, sex scenes, gory violence and bodily dismemberment, torture, and extreme language to name a few.
As an example of the latter... I overheard 2 women arguing with each other in a village in the game and I only caught part of the discussion but one woman said to the other "... or I'll stick a broken rake handle in your cunt." That kind of shocked me to hear in the game, then I laughed my ass off.
There are some rather graphic scenes in the game too including a prositute basically nailed to the ceiling dripping blood, people being burned alive at the stake for presumed witchcraft by a whacky relgious cult.
I have not seen nor heard of any evidence out there that the Steam version of this game is censored, and I can't think of any good business reasons whatsoever why Valve would force a game developer to censor their game without a law being broken that requires the game to be changed in order to comply with a law. In such a case, the same law would ultimately apply to GOG.com also and we've seen there are a few games banned in Germany to which GOG must comply. Steam's no different.
There is a difference between the things you mentioned in something like say the Witcher 3 where there is sex scenes you don't see penetration, you don't see a close up of male or female private areas, images of semen covering various parts of the body/"money shots" or even "Creampies" like what you see in the uncensored version of Huniepop or uncensored versions of most erotic VN's that are available on Steam.
Basically if a game has a R rated "movie" style sex and approaches to nudity then according to Steam and other stores it's fine but when it get's more hardcore to down right pronographic/XXX film style then that's a different story and the game needs to be censored to make it less..pornographic.