design of the Covenant Drones are perceived as reminiscent of the super soldier program and Buggers found in the novel. Bungie has also acknowledged James Cameron's film Aliens as a strong cinematic influence. A report written by Roger Travis and published by The Escapist compares Halo with the Latin epic Aeneid, written by classical Roman poet Virgil. Travis posits similarities between the plots of both works and compares the characters present in them, with the Flood and Covenant taking the role performed by the Carthaginians, and the Master Chief's role in the series to that of Aeneas. Music Martin O'Donnell and Michael Salvatori collaborated to produce the soundtracks for Bungie's Halo games. Approached by Bungie to produce something ancient and mysterious for Halos debut, O'Donnell decided to compose a theme using Gregorian chant, joining in with others to sing the vocal parts. Due to the varying nature of gameplay, the music was designed to use change dynamically based on the gameplay. To afford a more enjoyable listening experience, O'Donnell rearranged portions of the music of Halo into standalone suites, which follow the narrative course of the game, for the soundtrack releases. For Halo 2, the soundtrack included licensed music from Incubus and Breaking Benjamin alongside the orchestral score; rock guitar virtuoso, Steve Vai, performed various solos throughout the score. The music of Halo helped spur a renewed interest in chant music. For Halo 2s soundtrack, producer Nile Rodgers and O'Donnell decided to split the music into two separate volumes. The first, Volume One, was released on November 9, 2004, and contained all the themes as well as the "inspired-by" music present in the game (featuring Steve Vai, Incubus, Hoobastank, and Breaking Benjamin). The second release, Volume 2, contained the rest of the music, much of which was incomplete or not included in the first soundtrack, as the first soundtrack was shipped before the game was released. Halo 2, unlike its predecessor, was mixed to take full advantage of Dolby 5.1 Digital Surround Sound. In 2014, the in-game music was rerecorded and remastered for the Halo 2 Anniversary release which was part of the Master Chief Collection which included remastered versions of all Halo games with Master Chief as the protagonist. The soundtrack for Halo 3 was released on November 20, 2007. O'Donnell noted he wanted to bring back the themes from the original game to help tie together the end