Call of Duty: Modern Warfare 3 provides players with 4 weeks of pre-season weekly challenge brackets to entice players with some bonus rewards outside the standard six battle pass seasons. Similar to Apex Legends, players will unlock these weekly brackets on a rolling basis, but will be able to go back and complete challenges from previous weekly brackets even after that week has passed - allowing players to take on challenges at their own pace and when available to dedicate time to Call of Duty.