In the MW4 DMZ, the Massive Damage Challenge involves destroying a tank by making use of DDoS charges, a rocket launcher, and explosives. The difficult part is finding the rocket launcher and getting the necessary damages that will ensure the destruction of the tank. You can make this challenge easier by preparing the required equipment before deploying and using the train to locate the tank.
How To Complete The Massive Damage Challenge
In order to complete the Massive Damage challenge in MW4 DMZ, you should find a tank, place three DDoS charges on it, shoot it with a rocket, and kill the tank. You should make sure that it has at least three DDoS charges in its inventory. The DDoS charges can be crafted with the help of a printer prior to deployment.
A rocket launcher is also necessary for completion of the challenge; an RPG or Javelin would work perfectly fine. It may be difficult to find a rocket launcher, as rocket launchers are extremely rare loot items. You may be able to craft a rocket launcher through weapon blueprints or find a rocket launcher while searching for items on the map.
How To Find The Tank In MW4 DMZ

The tank will spawn randomly in the city, thus requiring you to search for some time to locate it. The quickest way to locate the tank is to go on the train and see the boss icon of the tank on your map. You will then have to move in that direction.
When you encounter the tank, use your DDoS charge and fire it at the tank three times. Remember to use an extra DDoS charge every time you use it. This will also reduce the armour of the tank and make it easier to eliminate. Finally, pull out your rocket launcher and launch rockets at the tank.
How To Destroy The Tank

After completing the objectives of the DDoS attack and rockets, your last objective will be destroying the tank. Normal bullets won’t work against it; the tank can be destroyed using explosives only. Just keep firing rockets, C4, and other explosives at the tank until it gets destroyed. Make sure that you have sufficient ammunition before beginning the battle.
There’s an ammo resupply point available near the tank; you can use it if you are running out of rockets. Another option is to bring ammo boxes with you so that you can reload your launcher during the battle. If you fail to destroy the tank in one match, you won’t have to restart the challenge from the beginning, as your previous objectives will remain completed.
