Ridiculously Large Weapons (SF)

From the introduction:

Let’s face it, some aliens are big. Like, really, really big. Others can fire lasers from their eyes while flying, breathe fire, or lob chunks of ruble the size of small trucks at your head. And against such opponents, sometimes you want a big weapon. Not just a two-handed weapon, or a cryopike that’s designed to be used in military formations, but an oversized weapon. And sometimes? Sometimes when your enemies are the kinds of foes that seem ridiculously dangerous, and to oppose them you need a ridiculously oversized weapon.