Retro is vintage pop-culture inspired. All human characters represent a different decade either: 1960's, 1970's, 1980's, or 1990's. I have their houses in chronological order along the bottom area of my map. My villagers use outdated slang as well. I enjoy watching my neighbors say things like: radical, groovy, peace, far out, like totally, for sure, so fly, wicked, cool beans, etc.