Once the CD-era hit and studio recorded music became more ubiquitous in games, it became increasingly common for game music to be composed by independent contractors, hired by the game developer on a per-project basis. Most bigger budget games such as "Call of Duty", "Mass Effect", "Ghost Recon", or "Lost Planet" hire composers in this fashion. Approximately 50% of game composers are freelance, the remaining being employees of a game company. Original score and soundtrack may require the hiring of a Music Director, who will help create the game music as well as help book the resources needed for performing and recording the music. Some music directors may work with a game's Sound Designer to create a dynamic score. Notable exceptions include composer Koji Kondo, who remains an employee at Nintendo, and Martin O'Donnell, who worked at Bungie until early 2014.