In Call of Duty, loops and arcs are used to create engaging gameplay experiences. The core gameplay loop consists of spawning, combat, dying, and respawning. Progression loops involve gaining experience points, leveling up, and unlocking new gear. Different maps and modes provide unique loops catering to various playstyles. The single-player campaign offers narrative arcs for context and motivation. Seasonal content introduces fresh loops and arcs, keeping players invested. The core gameplay loop in Call of Duty consists of the players spawning, engaging in combat, dying, and respawning. This loop keeps players engaged in the fast-paced action and provides a constant cycle of challenges and opportunities for learning and updating mental models.