Effective period / Period of releases: 2002 - 2007

Members: Adrián Moya, Fernando Alvarado, Francisco Pujol (2), Jorge Molina (2), Cristian Villareal, Cristian Chacón

Heavy metal band from San José, Costa Rica.
Formed in 1985 by Jorge Molina (guitar, vocals), Francisco Pujol (bass/vocals) and Francisco Paz (drums) upon the breakup of the pop-punk band Ciclos D.
Acero was the first band in Costa Rica to play heavy metal exhibiting a sound rooted in the traditional stylings of bands such as AC/DC and Black Sabbath.
The band split up in 1991, then was reformed in 1996.

Line-up:
Adrián Moya Fernandez - Vocals (since 1999)
Jorge Molina - Guitar (1985 - 1991, 1996 - present), vocals (1985 - 1987)
Francisco Pujol - Bass (1985 - 1991, 1996 - present)
Fernando Alvarado - Drums (1990 - 1991, 1996 - present)
Cristián "Chimol" Villareal - Guitar (2004 - present)

Former members:
Franklin Umaña - Vocals (1987 - 1988, 1997 - 1999)
Carlos Aguilar - Guitar, keyboards (1999 - 2003)
Alonso Aguilar - Guitar (2003 - 2004)
Francisco Paz - Drums (1985 - 1986)
Marcelo Galli - Drums (1986 - 1987)
Johnny Soto - Drums (1987 - 1989)
Juan Carlos Araya - Drums (1989 - 1990)
Adrián Ortiz - Keyboards (1988)
Eric Nassar - Keyboards