Harry Gregson-Williams is a games composer who started the games industry career in 1900. Since then, Gregson-Williams has been working with Activision, Beenox, Infinity Ward and Kojima Productions. Gregson-Williams's first game was Ratropolis published by Cassel Games for PC. Then, Harry Gregson-Williams went on to work on Ong-Bak as the composer. Later, Gregson-Williams also was part of the team who developed Call of Duty 4: Modern Warfare published by Aspyr for PC, Xbox One, PlayStation 4 and macOS. Most recently, Harry Gregson-Williams was involved in the development of Metal Gear Solid 4: Guns of the Patriots. Currently, Gregson-Williams is developing Call of Duty: Modern Warfare (2019) with Activision. It is set to release in 2019.