Wow, this one has a long history... It started life as a section of Bungie's M1 solo level Try Again. Butch created one of the best M1 Suicide levels ever by cutting off outside access to this ring... the original Killing Fields can be found in several packages, including Suicide Maps v.2. Laurent Stanevich converted this to a gorgeous M2 map, which has been remodified by Butch to include one of his favorite aspects of the Marathon universe...