Swearing

[lllDash]

Using swear words are inconsequential. It's the execution that matters! I am more emotionally involved in video games like Portal (A game with no swearing) than, lets say, Crysis (A game with lots of swearing).
Also, bear in mind, Profanity used to be a novelty in the past. It was new, edgy, and controversial. But now, it no longer has an impact on emphasis because of how casually it's been used nowadays.

All that profanity can do now...is offend a few people, especially religious people.
I'm not saying you shouldn't have swearing because it might offend a few people, I'm just saying: It won't really help the quality of a CS.

By the way, Amnesia wasn't rated M for violence and profanity (there wasn't much of that in the game) but rather for how scary it was.