Mental Horror is a Brazilian brutal death metal band, formed in Porto Alegre, Brazil, in 1993. In 1998, the band recorded a demo, titled Extreme Evolution Trauma. In 2000, signed with Necropolis Records. In 2001, release the debut studio album Proclaiming Vengeance on label Necropolis. In 2004 release Abyss of Hypocrisy and in 2006 Blemished Redemption.