High Quality Content by WIKIPEDIA articles! Arcanum: Of Steamworks and Magick Obscura (more commonly known as Arcanum) is a single player / multi-player computer role-playing game developed by Troika Games and published by Sierra Entertainment. It was released in North America and Europe in August 2001 for Microsoft Windows. Debuting at fourth position on NPD Intelect`s best-seller list, it was Troika`s best-selling title with 234,000 copies sold and with takings of US$8.8 million.