Zombie helmet: Reach Level 10 (max) for the 'Armor' stat at the Exo Upgrade Station. Zombie loadout: Reach Level 10 (max) for the 'Weapon Proficiency' stat at the Exo Upgrade Station. Zombie shirt: Successfully complete at least one round on every map. Zombie skin: Successfully complete Round 11 (secret zombie round) on the Riot map in Tier 4. Zombie pants and chest armor: Successfully complete 100 total rounds in the four Tier 3 maps. Zombie Exo and boots: Successfully complete 75 total rounds in the four Tier 2 maps. Zombie gloves and kneepads: Successfully complete 50 total rounds in the four Tier 1 maps. Successfully complete the indicated task in Exo Survival mode to unlock the corresponding zombie gear for use in Multiplayer mode: