Actually, this game was based on a custom engine built for lexipixel's other game, Arkland, which seems to have been closed. This was posted a while ago in shameless, and there is a little more info in Game Dev from a long time ago.
http://www.onrpg.com/boards/89143.html
http://www.onrpg.com/boards/67420.html
http://www.onrpg.com/boards/114718.html