From publisher blurb:
Thrills! Spills! Action! Adventure! Superheroic action using Light rules! Who wants to read through reams of text just to get to the action? No-one right? These rules assume you know how to role play. They assume you know about superheroes – especially those of the Golden Age. They assume you know how OSR products work. There, it’s done. You know how to play already. Just get on with it. Biff! Smash! Bam! Kapow!
Superheroes X takes characters to 6th level.
If you want a lighter version of this game, check out [Light Superheroes], which takes characters to 3rd level and has fewer options for quicker character creation.