Treyarch is a major developer in the Call of Duty series. Call of Duty: Black Ops II held the record for the largest entertainment launch in history in any form of entertainment, breaking the record within 24 hours of its release until it was surpassed by Grand Theft Auto V.

The games were first developed by Infinity Ward, then by Treyarch and Sledgehammer Games. Several spin-off and handheld games were made by other developers. The most recent title, Call of Duty: Modern Warfare III, was released on November 10, 2024.