Original sentence: A lesser-known combat alternative is the live steel combat system, developed in Scandinavia in the 1990s.Proponents of the live steel system claim that it encourages style and realism, rather than the competitiveness they see as a feature of the 'boffer' system.This system employs unsharpened steel weapons, which may only be carried and used by players trained and tested by the organisers prior to the game, and therefore limits physical fighting to a weaponcarrying minority while other players pursue other goals and stimuli
Edited sentence: A not so well known method is the live Steel combat system, which developed in Scandinavia in the 1990s.Only players trained and tested by the organisers prior to the game are entitled to carry and use weapons, the weapons are of steel, but not sharpened.The Steel system derives from the Boffer system, but encourages style and realism as an alternative to the Boffer system's competitiveness.This system limits the physical fighting to the weaponcarrying minority of the game, while the other players may pursue other goals and stimuli as murder mysteries, love stories, feudal plots, cultural clashes, ritual magic or other religion based storylines