No Mercy is an American thrash metal band from Venice, California, the brainchild of guitarist Mike Clark who later played in Suicidal Tendencies.

The band started in 1982 and featured lead vocalist Keven Guercio, guitarist Mike Clark, bassist Ken Blakley later replaced by Ric "Rancid" Clayton (the artist who designed the Suicidal Tendencies logo as well as the shirts on S.T.

Guercio recorded a few demos and the tracks on the Welcome to Venice (1985) compilation before leaving and moving to Jackson Hole, Wyoming and was replaced by Suicidal Tendencies vocalist Mike Muir.

Many of the songs on it, including "Waking The Dead" and "Controlled By Hatred", were re-recorded by Suicidal Tendencies from the Widespread Bloodshed album.

In early 2013, Mike Clark formed a new version of No Mercy under the name Waking the Dead (due to copyright issues with the WWF).