The Myth_II_Demo_v151.zip file you have requested: Official Demos / Myth 2 v1.5.1 Demo (Mac) - 52.67mb is not available. Perhaps try browsing all files for the game Myth II: Soulblighter and upload any files you want to share or are missing. This is the only information we could locate:
This is the latest update Demo for Myth 2: Soulblighter. It contains two single player maps and a multiplayer map.