The rules are the same as a Royal Rumble except everyone starts in the rings (battle royal rules in other words). When it gets down to 30 people (or something like that) they all move to the center ring. The match and the ppv was called World War 3.
The best part about World War 3 that I remember was that one of the opening matches before the actual match was a cruiserweight title match between Juventud Guerrera and Billy Kidman. It was great WCW style cruiserweight action that used all 3 rings
