The Metropolitano and Nacional were abandoned to make way for European style seasons beginning in 1985–1986.
The Metropolitano utilized a number of different formats, including the basic league table, 2 groups qualifying to semi-finals.
The number of participants varied between a low of 18 (1972, 1973 and 1981) to a high of 23 (1977) Initially, the tournament was held in the first half of the year.
The best clubs qualified for the Campeonato Nacional, a complementary first division tournament held in the second semester.
While the worst clubs competed in a reclassification tournament with the best teams in the Primera División B.