In this tutorial, we learn how to unlock the Tank Dropper achievement in Halo 3. This is an easy achievement that you will do when you first start out in the level. This is where you have to drop a tank onto someone and kill them. To do this, you need to stand up on a higher area and find your target. Once you do this, you will be able to grab the tank and then drop it onto the target you have found. After this, you will get the achievement and you will be able to continue on. If you miss, just try again until you have finished the challenge.