There are at least two Lee Jacksons: 1. Lee Jackson, born 19 November 1963, Austin, Texas, USA, is Music and Sound Director for 3D Realms Entertainment. He is best known for composing Grabbag (Duke Nukem Theme), now one of the most recognizable PC game themes to date. 2. Lee Jackson (born Keith Anthony Joseph Jackson, 8 January 1943, Newcastle upon Tyne) is a British bass player and singer. Jackson rose to prominence in the 1960s in the progressive rock group, The Nice, with keyboardist Keith Emerson and drummer Brian Davison.