Christopher Chiyan Tin is an American composer of art music, often composed for film, television, and video game soundtracks. His work is primarily orchestral and choral, often with a world music influence. He won two Grammy Awards for his classical crossover album Calling All Dawns.

Civilization IV is a 4X turn-based strategy computer game and the fourth installment of the Civilization series, and designed by Soren Johnson under the direction of Sid Meier and his video game development studio Firaxis Games. It was released in North America, Europe, and Australia, between October 25 and November 4, 2005, and followed by Civilization V.