Fudge is half a tabletop RPG and half a toolbox for building your own tabletop RPG. There aren't any default rules, just a bunch of different ways of doing the same thing. The idea is that each GM would customize the game to fit their preferences.
Fudge Lite is my personal build of Fudge, designed to be as light as possible without sacrificing playability. Task resolution is always just a single roll of the dice against a GM-determined difficulty, and for combat initiative the GM just moves the spotlight between the characters as needed.