Stirling City Stories
Here are some links to various PDFs that explain, or expand, rules:
How does Reputation work?
Reputation represents how likely you are to be recognised, through either an Intelligence or Knowledge (Pop Culture) check (DC 25). (Sometimes another Knowledge skill may be more appropriate, but generally Pop Culture should cover all superheroes and supervillains.)
Every hero (and villain) has a base Reputation score equal to their Power Level, which is the level of the campaign for the player characters. This value can be raised or lowered through a couple of feats (Low Profile, for example). Sometimes, you may receive a story based bonus to your reputation score also (representing the media focusing on you for your deeds, whether good or ill).
Once a character has been recognised, this can lead to bonuses (or penalties, depending on the nature of your reputation) to certain interaction skill checks. A good reputation helps in most instances, while a bad reputation is a liability most of the time (unless you’re trying to Intimidate).