Out of the many street games that I designed together with Daniel Boy from Invisible Playground, this is one of my favorites.

The game was initially designed in 2010 as "Tiny Urban Game", then later, under the impression of homelessness around Nyugati Station during Field Office Budapest, expanded to include "Unwanted Entities": gray figures not played by any team but constantly moved around by everyone.

Have a look at the preparation tutorial and rules.