32. K9000 Cyberdog
Fallout: New Vegas
It's a shame all of New Vegas's most interesting weapons, the K9000 Cyberdog included, were packed into pricey DLC nuggets. We can't help mentioning it anyway, since it's quite literally a machine gun with a dog's brain stuck in a little glass vial. It wags its "ears," barks, and sniffs out enemies before you can see or Perceive them. And it packs quite a punch, as well, firing magnum ammo and boasting a scope. Good boy.