Another demo, multiplayer-only, was issued on October 2, but the discovery of a bug led to its removal. A different fixed demo was released a day later. Xbox players had the opportunity from December 15 on to win one of 50 copies of the game. The campaign was dubbed "13 Days to Xmas": those who spent not less than 13 hours playing until Christmas were qualified for the contest. The winner was randomly selected on January 9. Soundtrack The Thirteen Soundtrack was composed by several artists from the San Francisco-based music label Future Primitive Sound. 13 tracks were produced, all of which were initially unnamed. According to the booklet, the DJs are connected with the characters, such as DJ Faust and Shortee with XIII, DJ Zeph with Carrington, or J-Boogie's Dubtronic Science with Mongoose. The album opens with an introduction and then includes songs in the likes of typical 70s-era music such as soul, funk, jazz, but also hip hop. According to founder and creative director of the collective, Mark Herlihy, the soundtrack project began with Herlihy's friend, Pete Jacobs, whom he met at a gig, five or six years previously. After studying the characters and the story, the group decided on a noir and futuristic style that would reflect the espionage theme. Its rhythm ranges from 105 to 120 bpm. Herlihy later stated that they "wanted to capture the essence of XIII in this soundtrack by showcasing its nostalgic style while giving the beats a modern twist" and their intention was "to tell its story through the music and create a seamless head-nodding mix that would complement the energy of XIII and get gamers hyped." One reviewer of IGN gave the album 8 out of 10 stars, stating: "It's an album that works expertly as a chill-out slice of background groove, yet it also doubles as a dance floor jolt of exuberance perfect for spinning at a small party", but also stated that the player, understandably, quickly forgets the music while playing. He concluded that the album is "jazzaphonic electronic tripped out funkuphoria". Reception XIII received "mixed or average" reviews, according to video game review aggregator Metacritic. Reviewers often praised the game's graphical style and presentation, while criticising the gameplay. GamePro called it a "rejuvenating, jaw-dropping experience". IGN said "XIII has a great story-driven sheen, but at its core, it's weighed down by some occasional bewildering flaws, in addition