UFC 6 featured the crowning of the first UFC Champion to win the title in a non-tournament format. The champion would be the winner of a special match called 'The Superfight', which continued from UFC 5 as there was no official winner in the previous Superfight.  UFC 6 also featured an eight-man tournament, and two alternate fights which were not shown on the live pay-per-view broadcast. The tournament had no weight classes, or weight limits. Each match had no rounds; therefore no judges were used for the night. A 20 minute time limit was imposed for the quarterfinal and semi-final round matches in the tournament. The finals of the tournament and the Superfight had a 30 minute time limit and, if necessary, a five-minute overtime.
This event continued the Superfight format from UFC 5 to determine the reigning UFC champion for tournament winners to face. Ken Shamrock remained in the spot and his opponent was UFC 5 champion Dan Severn in a championship match dubbed as "The Clash of the Titans".