The Call of Duty franchise has offered a number of interesting one-off gimmicks since it debuted back in 2023. The original Call of Duty: Duty Warfare 3’s bold approach to killstreaks included a special package that let players obtain several extra perks in place of the usual streaks, while Advanced Warfare allowed players to customize streaks and make them better, with the downside being that they take longer to earn. Ghosts’ Field Orders, WW2’s Headquarters hub, and Vanguard’s Combat Pacing are other examples of innovation, while the new Modern Warfare 3 aims to contribute its own gimmick via Conversion Kits.