Perk-Based Loadout Customization

Player fills slots, typically a primary weapon, a secondary, equipment and two or three perks that alter movement, detection or damage. Choices persist across matches and are unlocked through play, so the loadout screen doubles as a progression display. Balance moves from designing roles to constraining combinations, since the interesting failures are rarely single overpowered perks but pairs that remove an entire counterplay option.

Infinity Ward's Call of Duty 4: Modern Warfare in 2007 attached persistent unlocks to a competitive shooter that had previously handed everyone the same tools. Motivation was retention, because a match ending with a new attachment gives a reason to start another one. Design also flattered variety, since a lobby of players carrying different configurations produces a messier and more surprising match than symmetrical loadouts do.

Customisation became standard almost immediately, and with it the expectation that a competitive shooter is also a progression game. Costs are borne by newcomers, who face opponents holding tools they cannot yet earn, and by balance teams managing a combinatorial space. Games that resist it, keeping every player identically equipped, now market that decision as fairness, which shows how thoroughly the default has shifted.