GURPS Supers
GURPS (Generic Universal Role Playing System) is a very modular and customizable pencil and paper
role-playing game system. It can be used to play games in a
superhero setting by using the book titled "GURPS Supers".
Several advocates of other role playing systems feel GURPS Supers is best used for Heroic games, but is lacking in modeling comic stories which are part of super-heroic games.