Borderline is a border drawing game. Each round, a country or a national subdivision appears with its borders rubbed off the map, and the player must draw its land borders or coastline from memory. Every line drawn is kept, anonymously, and laid over all the others in the maps above. Where most people agree, the ink builds up into a clear line; where memory is vague, the lines spread out. The result is a map of how people remember the world.

Each page contains a full-size map made up of the players’ drawings, as well as a statistical table and minimaps detailing the drawings per country, state, département...