Mushroom 11 is Out Now! Posted on October 15, 2015October 15, 2015 by Julia Keren-Detar 10/15/15 Happy National Mushroom Day! Mushroom 11 is Out Now! After many years of hard work we are finally out on Steam, GOG and Humble for PC, Mac and Linux. Post navigation ← Mushroom 11 at Tokyo Game ShowMushroom 11 in the Humble Freedom Bundle →