According to Wikipedia

Infinity Ward, Inc. is an American video game developer. They developed the video game Call of Duty, along with seven other installments in the Call of Duty series.

The Company Establishment

Vince Zampella, Grant Collier, and Jason West established the company in 2002 after working at 2015, Inc. previously.  All of the 22 original team members of the company came from the team that had worked on Medal of Honor: Allied Assault while at 2015, Inc. Activision helped fund Infinity Ward in its early days, buying up 30 percent of the company.

The Studio Games

The studio’s first game, World War II shooter Call of Duty, was released on the PC in 2003. The day after the game was released, Activision bought the rest of Infinity Ward, signing employees to long-term contracts.  Infinity Ward went on to make Call of Duty 2; Call of Duty 4: Modern Warfare, Call of Duty: Modern Warfare 2, Call of Duty: Modern Warfare 3, Call of Duty: Ghosts, Call of Duty: Infinite Warfare and the Modern Warfare reboot.

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