Weekly challenges in Modern Warfare 3 and Warzone are essential for unlocking special rewards, such as animated camos and unique blueprints. Season 5 introduces the coveted Chainbreaker animated camo, which requires players to complete five weekly challenges each week for eight weeks. The challenges span across multiplayer, Zombies, and battle royale modes, making the gameplay more varied and rewarding. Alongside camos, players unlock conversion kits and weapon parts that influence the meta, keeping the competition fresh. Players must complete these tasks before the next season starts on September 18.