A very quick entry thanks to Peter Weighill for a game that was advertised by American Eagle in 1984.
The Elysian Fields was released on the Apple 2, but the Commodore 64 edition of the game seems to be completely at large.
The game was an educational graphic adventure game which was likely being converted from the Apple version. American Eagle were employing external Commodore 64 developers to convert a number of their games.
A page at http://gue.cgwmuseum.org/galleries/index.php?pub=3&item=44&id=2&key=0 from the Apple author says that the C64 version never existed, though we have been told by Michael Giltzow that American Eagle was paying for C64 conversions.
Did anything ever manage to see the light of day? Much more info needed!
Contributions: Peter Weighill