Original sentence: The most common example of this is when a fangamer develops a game based on a "family friendly" series such as Mario, but gives his or her game a more "adult" atmosphere through the use of more adult situations, graphics, or dialogue
Edited sentence: The most common example of this is when a fangamer develops a game based on a "kid friendly" series such as Mario, but gives his or her game a darker or more mature atmosphere through the use of more adult situations, graphics, or dialogue