Get from one country to another by crossing only shared borders, and do it in as few hops as you can.
You're given a start country and a destination. Move between countries that physically share a border, building a chain across the map. Reach the goal, ideally in the fewest hops possible.
Border Hop turns the world's shared borders into a shortest-path puzzle, building knowledge of which countries touch which.
Moving only between countries that physically share a border turns the political map into a graph, with countries as nodes and frontiers as edges.
Asking for the fewest hops is the original constraint.
That makes it a shortest-path problem over a graph whose shape carries real history. Chokepoints matter enormously — a handful of countries connect entire regions, and islands connect to nothing at all, which is why some pairs are unreachable no matter how well you know the map.
Border Hop is an original, free browser geography game that turns the world's shared borders into a shortest-path puzzle. No download or account needed.