Not to be outdone by their goody-two shoes counterparts, the lead antagonists of any show, movie, comic book, etc. can be easily recognized by a lone symbol that identifies who they are: the ultimate bad-asses.

Here are ten symbols that are sure to instill fear in the hearts of good guys everywhere:

Zentradi (Chou Jikyuu Yousai Macross series): In the original Macross Japanese anime series (Big West/Studio Nue, 1982) the Zentradi were created as a spacefaring race of giant humanoid proxy warriors by the first civilization in the galaxy, the Protoculture, 497,500 years ago. They contributed greatly to the expansion of the Protoculture Civilization’s sphere of influence and the creation of a Protoculture Stellar Republic that controlled most of our galaxy. [Source]

The Guild of Calamitous Intent (The Venture Bros. series): The Guild of Calamitous Intent is an organization that oversees the operations of super-villains. Led by the Sovereign, this organization is larger than the The Peril Partnership, the Fraternity of Torment and all unlicensed villains combined. Providing organized havoc since 1910, The Monarch, Baron Underbheit, Phantom Limb and many other super villains on the show are or were a part of this organization.  [Source]

Cobra (GI Joe series): Cobra is a ruthless terrorist organization determined to rule the world. They are usually led by the ruthless Cobra Commander, although others have at times usurped control. It relies on the might of its legions of Cobra Vipers and Cobra Troopers to execute its diabolical schemes while trying to destroy its main enemy: G.I. Joe. [Source]

Decepticons (The Transformers series): The Decepticons are a malevolent race of robot warriors, brutal and merciless. The Decepticons are driven by a single undeviating goal: total domination of the universe. In the war that raged between the Decepticons and Autobots for millions of years, their home planet of Cybertron was drained of its once rich sources of energy. In hopes of finding new reserves for making Energon, their basic fuel, the Decepticons followed the Autobots to Earth. [Source]

Galactic Empire (Star Wars films): The Galactic Empire, also known as the New Order, the Old Empire, the First Galactic Empire, Palpatine’s New Order, the Imperium or simply the Empire, was the galactic government established by Supreme Chancellor Palpatine to replace the Galactic Republic in 19 BBY and bring Sith rule to the galaxy. [Source]

The Visitors (V series): The Visitors are an extraterrestrial race of reptilian humanoids outwardly appearing to be much like Earth’s homo sapiens, revealed to be reptilians covering their bodies in cloned human flesh. They are often referred to by the shortened slang term of just “the V’s”. The actual name of their species as they call themselves in their native language is thus far unknown. [Source]

Helghan Empire (Killzone series): The Helghan Empire is the autocratic governing body of the Helghan Nation on planet Helghan, ruling over the Helghast people. It is the central, main antagonistic force of the Killzone series. The founder and first ruler of the Empire was Autarch Scolar Visari, who was succeeded by Admiral Orlock, the Helghast Military Commander, following the battle of Pyrrhus City, invasion of Visari Palace and his death. [Source]

HYDRA (Marvel Comics, various series): HYDRA is a criminal organization dedicated to the achievement of world domination through terrorist and subversive activities on various fronts, resulting in a fascist New World Order. Its extent of operations is worldwide, always attempting to elude the ongoing counter-espionage operations by S.H.I.E.L.D. [Source]

Umbrella Corporation (Resident Evil series): The Umbrella Corporation is a fictional bioengineering pharmaceutical company in the Resident Evil universe, that serves as one of main antagonists in the series. It is portrayed in the games as a major international player in a number of markets including pharmaceuticals, medical hardware, defense, and computers along with more clandestine operations utilizing genetic engineering and accused viral weaponry. [Source]

Klingon Empire (Star Trek original series): The Klingon Empire was the official state of the Klingon people, founded in the 9th century by Kahless the Unforgettable, who first united the Klingon homeworld of Qo’noS. Since then the Klingon Empire expanded its sphere of influence by conquering numerous systems and incorporating them in the Empire. [Source]