Mutant Mushroom - Adventure 2: Sky Castles Cost: $6 Get the full version     Trial version     Developer's Website Contacting third-party download site please wait. If your download does not start, click here, or get the full version Descriptions Mutant Mushroom - Adventure 2: Sky Castles: Sky Castles is the second Adventure in the Mutant Mushroom series. Sky Castles requires the full version of Mutant Mushroom (FREE) to be installed on your computer.