A fearsome dragon monarch rules over planet Genrovis with an adamantine claw, oppressing its people, hoarding resources, and controlling the world's dwindling energy. As Genrovis rebels against the dragon's tyranny, a group of heroes delve into forbidden ruins seeking legendary technology from the ancient past-four one-of-a-kind mechs! But will their mechs be strong enough to take on a dragon? To Defy the Dragon is a complete Starfinder adventure for 10th-level characters written by Kendra Leigh Speedling, and features a primer on Genrovis and its secrets as well as new starmetal mech options!