Gangrene is an American musical duo consisting of rappers/producers The Alchemist and Oh No.
In 2013, Gangrene, together with Tangerine Dream and Woody Jackson scored and composed the original score for Grand Theft Auto V by Rockstar Games.
From Wikipedia (https://en.wikipedia.org/wiki/Gangrene_(group)) under Creative Commons Attribution CC-BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0/legalcode)