If you haven’t noticed yet, Explosive Walkers have undergone a change. They no longer give out a constant large damage blast. Instead, they do a blast damage relative to their level. This means you probably won’t always kill Normal Walkers in the blast radius, and definitely won’t always kill Tank and Armored Walkers. This may have been a bug, so keep an eye out!
Click HERE for the Overview, Strategy and Tips for the Ka-Boom Challenge.