When creating games, sometimes portraying adult themes, like violence or swearing, can be a common thing. Sometimes we even see despicable villains do horrible things. How far is too far when creating adult themes in your games? Does it reflect on the developer when they add extremely vile characters or distasteful subject matter in a villain for example? Whether it be in a comedic way or intended to be serious content, I am curious of the connection players distinguish with these types of content pieces and their creators. 

In quite a few of my games, I have a “dark” theme. As mentioned above, whenever I’m making a game, I’m not really thinking “how much is too much”, I’m just thinking about what I want to express, and how I want to express it.

There are times where violence might not add anything to a creation, in this case it might be better to be removed, minimised, or even just hinted, as it shrinks the number of potential users (mainly young people). However that’s up to the artist. Do they want to just express themselves? Do they want more users? Or both?

I agree with mid that whatever the developer thinks is necessary to convey the message is good. 

Different people can have very different tolerance to horror/violence/gore. I make only horror games and each of my game has received feedback ranging from the game being "too scary" to "not scary at all." It is very hard to determine if a game has gone "too far," and I think game creators should just make whatever they like.