A microwave pulse gun is a theoretical weapon. MPGs are to microwaves what deadly lasers are to light waves. It operates as a sort of high-power maser, concentrating high-energy microwaves in a beam to superheat anything in its path.

Makes an appearance in the game Soldier of Fortune, where it basically sets fire (and blue fire, no less) to anything within the path of its beam. SoF also claims that it goes against UN rules for warfare, and leads one to wonder how a mercenary operating for the UN can be allowed to use it.