The "Adult Playground" series focuses on urban environments converted into makeshift arenas. Battle 6.2 specifically highlights the transition from "backyard" fighting to a more regulated, albeit still gritty, combat format.
The title is known for its distinct visual style, featuring detailed character designs and animations that have become more polished in later versions. Street Brawlers- Adult Playground -Battle 6.2-
The answer lies in the nostalgia of "liminal play." The "Adult Playground" series focuses on urban environments