This post contains D&D 5E rules that can be used to adjudicate attempts by characters to replicate Hercules’ tenth labor, which included slaying three-headed giant Geryon and driving his cattle to Greece, as described in the “In the Footsteps of Hercules” universal sourcebook.
An extraterrestrial presence is real. They watch us strip-mine the planet to fuel the growth of populations and economies. Will they intervene to help us avert disaster? And what's with all the anal probes?