Avadon: The Black Fortress has been released on Steam for both PC and Macs for the unusually low price - for Spiderweb - of $9.99/€6.99 and is currently 10% off for its launch, meaning you can buy it for only $8.99/€6.29. In case you wanted to try the title before a purchase, it should be noted that a substantial demo is offered on the developer's website.