Where would the Metal Gear games be without their diverse cast of villains? While the heroes of the long-running series are few – each entry introduces countless new and memorable additions that strike fear in our hearts.

The following ten baddies were chosen based on legacy, overall impact in the MGS world, characterization, threat/challenge level and editor's choice. Of course, if you beg to differ, list your choices in the Comments and vote in the poll below. Just don't be surprised if an angry Gray Fox pays you a house call.

Villain #3 – Gray Fox/Ninja
First Appearance: Metal Gear

Gray Fox is one of the more unusual members of this list. He went from being respected hero to clandestine villain, to cybernetic badass and back to being a hero again. Whether players are rescuing Gray Fox, battling against him, or watching gleefully as he rips entire rooms of soldiers to shreds, Gray Fox never fails to impress.

In the original Metal Gear, Gray Fox is one of the high-ranking members of FOXHOUND. Solid Snake is sent to Outer Heaven in order to rescue Fox, and it is then that Snake earns the menace of Metal Gear. In the sequel, Gray Fox willingly defects to Big Boss' side and becomes Snake's enemy. As we all know, Snake's enemies don't tend to last very long.

However, in this case they do. Gray Fox returns in Metal Gear Solid as a cybernetic ninja. After decimating squads of soldiers, Fox and Snake once again square off. However, in the end, Fox redeems himself by sacrificing his own life to help Snake destroy Metal Gear Rex. Even at the end, Fox knew how to go out in style.

Trivia: Fox appears to be dead once and for all, but his technology lives on. Raiden sports a suit and sword in MGS 4 that bear more than a slight resemblance to Gray Fox's Ninja garb.

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