Powers for Good: Issue #0 (2014)

from the Introduction:
Welcome, loyal readers, to Powers for Good Issue 0: Dr. Fission vs. the World! This roleplaying game holds the promise of unlimited adventure as you take on the roles of heroes and villains with powers far beyond those of mortal men.

This being your introduction to the superheroic world of Powers for Good we’ll keep things simple. Issue 0 focuses on one team of heroes, one villainous plot, and just the rules you need to play. The rest is yours, as are these rules—you can do whatever you want with them (including selling your own adventures) so long as you give attribution.