1977 Torneo Descentralizado Wikipedia
The 1977 Torneo Descentralizado, the top category of Peruvian football (soccer), was played by 16 teams. The national champion was Alianza Lima.
The season was divided into 3 stages. The Preliminary Tournament contested in two groups (home and away matches plus 2 inter-group matches); each group winner qualified for the Championship Group. The second stage was the Descentralised (league tournament); the top 4 qualified for the Championship Group and the bottom two played for relegation. Championship Group was contested by 6 teams in home and away matches; teams carried their Descentralised Tournament record. Although finishing fifth in Descentralised, Universitario qualified for Championship Group, as Alianza had already qualified in Preliminary Tournament. Municipal and Cienciano played a third relegation playoff on a neutral ground, as each team won one match after home and away matches.