Mail Plane . Prototype game. Introduced GCE/MB marketing literature in USA, Canada, Europe, and Japan. The prototype for the USA area map version appears to be a complete game. Also pictured in MB Finnish language marketing literature for Nordic and European areas indicated MB intended to provide a release with maps specific to Europe. In 2013 Mail Plane was recovered from a prototype cartridge by Chris Romero . The recovered software was released on December 1, 2013 as binary image via made available for public download.