From publisher blurb:
Stalwart is the world's niftiest superhero RPG. In only 16 pages, it includes everything you need for ongoing play. This includes a tiered rating system that scales from street-level to cosmic, with simple and efficient rules for dozens of powers and abilities, a clever and intuitive action management system to keep the action feeling true to the comics, and a robust character creation system that allows you to quickly generate a wide range of colorful heroes and villains.
The game is supported by two living documents: the Stalwart Companion (constantly updated with new player options) and the World of Stalwart, a campaign and story guide with characters, setting, and adventure background to keep your game moving upward and forward.