Which Call of Duty game introduced the Pick 10 create-a-class system?

Call of Duty: Black Ops II introduced the Pick 10 create-a-class system. Developed by Treyarch and released in 2012, the game replaced the more rigid class-building structure used by earlier Call of Duty multiplayer modes with a flexible ten-slot budget.

Players could spend those ten picks on weapons, attachments, perks, lethal equipment, tactical equipment, and Wildcards. Every selected item consumed a slot, including attachments and Wildcards that expanded a class’s possibilities. This let players build highly specialized loadouts, such as sacrificing a secondary weapon for extra perks or stacking attachments onto a primary weapon.

The system is often confused with later variations. Advanced Warfare expanded the idea into Pick 13, while other games modified or abandoned the format. Black Ops II was the original main-series introduction, and its design influenced several later Treyarch and Infinity Ward multiplayer titles. The system also helped make loadout decisions more strategic because each extra advantage required giving something else up.