Being a multiplayer-focused franchise for the best part of two decades now, Call of Duty has had its fair share of imbalances over the years, from weapons to Killstreaks to cosmetics. But by far some of the most controversial Call of Duty imbalances have come from the series' vast array of multiplayer Perks. Designed to grant the player various advantages in battle, Call of Duty's Perks haven't always functioned how they were meant to, or even worse, their intended function has only led to pure frustration.