Use the Brain Rot gun to shoot cysts with single shots to try and Brain Rot it. This can be an Infested Stronghold or the smaller Aether nests. You don't want this to be upgraded or super powerful. Pill bottleįor this item quest, you'll need to put the brain rot mod on a gun. For this, I'd recommend spawning in with a gun with range, the Brain Rot ammo mod, Deadwire ammo mod, and a piece of fire-based lethal equipment. You can always get an item and exfil for use at a later time, or you can essentially complete them all in one match, if you're really prepared and efficient with your time. You don't need to get these remaining pieces in any specific order, but you'll want to spawn in with certain equipment or ammo mods to make the task easier. The Locked Diary from the story mission rewards is one of four items you need. Exit the mission to extract with this item. Follow this guide and make sure to collect the Locked Diary item from the reward rift. Here we provide a full guide for the Bad Signal story mission, including all the gear you'll need to take out the boss. Now Playing: Modern Warfare III | Season 1 Zombies Trailer By clicking 'enter', you agree to GameSpot's