wanted to make sure it didn't look too digital." As a side-note, in the DVD commentary the brothers explained that they wanted actor Adam Baldwin to reprise his role as Garber in Predator 2, but were unable to do so, instead using Robert Joy as a new character. Additionally, while the previous installment attracted casual moviegoers as well as fans of the franchises, the film catered exclusively to Alien and Predator fans with many references to the previous films appearing in the film. Music Composer Brian Tyler was hired to write the score for the film. The soundtrack album was released on December 11, 2007, by Varèse Sarabande. Despite not appearing in the CD soundtrack, the song "Wach auf!" ("Wake Up") by German band Oomph!, was released as a promo in January 2008, with the music video using clips from the film. The song was appeared on the band's album Monster. Release Theatrical Aliens vs. Predator: Requiem had its premiere at the Los Angeles Comic Book and Sci Fi Convention in Los Angeles on November 4, 2007. The Brothers Strause attended the event, presenting the film to an audience for the first time. The film was later released in the United States and in other territories on December 25, 2007. Home media Aliens vs. Predator: Requiem was released on DVD, Blu-ray and PSP UMD Disc on April 15, 2008, in North America and May 12, 2008, in the United Kingdom by Fox Home Entertainment. It was released in three versions: a single-disc, R-rated version of the 94-minute theatrical presentation, a single-disc unrated version extended to 101 minutes and a two-disc unrated version with the 101-minute film and a second disc of special features. Extra features on the single-disc editions include two audio commentary tracks: one by the directors and producer John Davis and a second by creature effects designers and creators Tom Woodruff Jr. and Alec Gillis. Disc one of the two-disc unrated edition includes both commentary tracks as well as both cuts of the film seamlessly branched and an exclusive "Weyland-Yutani archives" picture-in-picture reference guide to the warring alien races; five behind-the-scenes featurettes: Prepare for War: Development & Production, Fight to the Finish, The Nightmare Returns: Creating the Aliens, Crossbreed: The Predalien and Building the Predator Homeworld; multiple galleries of still photos showing the creature designs and sets; and the film's theatrical trailer. The second disc includes a "digital