Usually, nothing, but if my Mom walks in when I'm playing something gory, like, for example, right now (Prototype), she has to walk out. The sheer gore of a game like Prototype freaks her out a bit. It also freaks out my sister. My father would be unaffected because of some past experiences he's had (watching some get horrible mangled in a car accident and than seeing them bleed to death would do that to ya!), and my step-father is mostly unaffected because of Doom (he loves Doom). He would hate Prototype, though, because of the many buttons used. If it doesn't stick to just face buttons, he doesn't want to play it. So, he basically hasn't moved beyond the early 5th generation (PS1, N64, etc) games.