Tren Loco is an Argentine heavy metal band formed in the suburban town of Grand Bourg, in Buenos Aires Province. Their lyrics relate social issues, like "Clase trabajadora", "Fuera de la Ley" and "Lucila"; others are about political issues, such as "Pampa del Infierno" and "Nos vemos en Cutral-Co". They also write about personal matters: "Endemoniado", "No me importa" and "A ultranza". The group's name is inspired by the classic Ozzy Osbourne song: Crazy Train.