
VtM Bloodlines 2 just got me yesterday because it changed up the dialogue my character speaks when I put on a catholic priest outfit. He provokes people to rage by saying vampy things depending on his clothes but in the priest suit it’s just simple "Damn you!"s and calling people demon or quoting the exorcist. The NPC’s have the best replies to this though.
Before that it was probably the music video scene from The Alters
Not “massive” at all. But it’s not a demo anymore. I haven’t looked under the hood in a while since back when it first came out but it used to just create NPC’s mirroring your other players actions. That was a long time ago though, I can’t imagine it working this well still using that method
Edit: Here is the list of features, looks like it’s up to 8 people now. But I think it probably does still use that old method, based on the way this is all described