The original LNH universe, with history going back to 1992 and a cast of thousands!
In 1992, the Legion of Net.Heroes fought the malevolent Doctor Killfile. Though they had existed before, from this day on, they became the weirdo heroes of Net.ropolis and the entire Looniearth! They have faced threats from the tiny to the cosmic, including wRift, Flipseid, the Bryttle Brothers, and the end of the world itself! And now, the net.heroes of yesteryear have retired, and new champions are taking up the torch!
See also the Classic Looniverse.