>> Software Tycoon : http://www.rune-soft.com/product.php?product_id=111

> They don't appear to be selling this game anymore.

Try this:

http://www.rune-soft.com/shop_e/morphos_shop/morphos_shop.html

Interesting on another note:

"Release date: 30. September 2010
[...]
Platforms: Mac, MorphOS, Windows"
http://www.rune-soft.com/Games/Released/Game-239/game=Rhem_4_The_Golden_Fragment-34

;-)