Gamestudio A8 is freely available as a basic version including WED, MED, GED, SED wink .
http://server.conitec.net/down/gstudio8_setup.exe
A list of Gamestudio tools and third party tools can be found in the Wiki. http://www.opserver.de/wiki/index.php

Are you working in the games or comuter industry nowdays or was Sunset Down and game design just an idea from the past?