Insanity were from Soure, Coimbra. The band began in the summer of 1988, by Nuno Dias guitar, Rafael Mota drums, Rui Alex solo guitar and Sérgio Leitão vocals/ bass. The first live performance comes in June 10th 1989, in Juncal. Between June and February 1990, the band decide to make a pause for reflection. Rafael Mota leaves on February 10th 1990, passing Sérgio Leitão to the drums and Nuno Dias to the bass. However had already joined the band João Trevas as vocalist. With this line up, Insanity gave several concerts, mostly in the central region. In May, João Trevas is replaced by Tony. The performs at the 1st Nazaré Metal Festival, August 25th 1990, along with Thormenthor, Necrophilia.