It is based on an original shortest path algorithm and core concept by Thomas Colcombet and programmed by Christian Mauduit.
Historical Merit Badge Program: Four historical merit badges will be available in 2010 only: Signaling, Tracking, Pathfinding and Carpentry.
Zero-K run on Spring engine and by 2013 the engine now include an alternative pathfinding algorithm and multi-core support that aim to address this performance issue.