Quote from GruntTheDivine
Shiva missiles are ship to ship, HAVOKs can be used on ground or mounted onto a missile.. Its the same device that the Master Chief uses to destroy the Didacts ship in Halo 4.
EDIT: The blast radius of the HAVOK is pretty large if you ask me (Of course though, it does not just make a big hole in the ground, that is pretty unrealistic if you ask me. I am considering adding other explosives, but you all have to consider how these will operate on servers.. The HAVOK can cause major lag on SMP when detonated, and some lag on SP too. Anything larger might be to much. However, I will most likely make Anti matter charges do something similar to the HAVOC, but cause more destruction in the area were it was detonated...
Ah, ok. If larger explosives are added, would there be any way to make it affect player-placed blocks more than natural blocks? It would decrease the size of the blast crater.