Due for release in May 1985, Blue Sun was believed to have been a graphical adventure from Zinta Micro-Systems in 1985.
Sadly, although advertised in the US – it seems the game was never released. Quite possibly it was due to poor sales of Caveman (which is in Gamebase and released, albeit in limited numbers).
We know very little at this stage about the game and hope that something may come up in the future!
Contributions: Asphodel