Big Bad Evil Guy

Sauron, pretty much the archetypal "Dark Lord" common to fantasy and an inspiration to countless BBEGs. We love you big S! :D

The Big Bad Evil Guy, typically shortened simply to BBEG, is roleplaying gamer slang for the primary antagonist of an adventure or campaign. He is the one ultimately responsible for whatever shit his associates or minions do, and defeating him usually means the successful conclusion of a campaign (or at least a part of it). To ensure that this is sufficiently dramatic, DMs often make the BBEG a powerful character, making this final encounter something of a boss fight. The BBEGs seem to know this is coming, so they will usually construct a suitably impressive lair for the suitably dramatic confrontation to take place in.

Many of these fantasy villains often like to address themselves as 'The Dark Lord' or add 'Dark Lord' before their name, just in case you goblin-fondling peasants weren't paying attention to who they are.

Hilariously though the sheer incompetence of some of these big bads is at times a beauty to behold, as their over-arrogant natures, the stupidity of their minions, or luck and/or skill on the part of their opposition means their plans fall apart dramatically. For example Harry Potter, despite being a teen and knowing as much magic as a mouse for most of the series, time and time again foiled Voldemort's plans. Despite having control of one of the key factions in 40k, Abaddon has failed to get anything done in 10,000 years (the fact that Abbadon hasn't been killed or overthrown yet is Games Workshop won't let the story go in that direction). And yet how do they get by with so much failure when they would have roasted their henchmen alive if they had done the same? Simple; if you dare to mention it to their face about their joy-to-watch failures, YOU will be the one roasting alive!

In most video games the BBEG is usually the final villain which you and maybe a couple of hanger-ons have to defeat to win the game. Whether it will be a hard fight or not depends how merciless the game designers are feeling.

Paladins are automatically required to attempt to offer the BBEG mercy, even if they have happily slaughtered hundreds of relatively less evil minions without mercy on their way to the BBEG's lair.

Requirements to become a BBEG

1. Kill a lot of innocents (unimaginative, but kind of a must-do on the list; a tradition).

2. Make big grandiose plans that also include big holes in them, just enough for someone to mess up if needs be.

3. Surround yourself with minions and right-hand men. Your evil meter goes higher the more bodies you can pile up there.

4. Have a characteristic to define you from the masses, like a menacing eye (Sauron), the ability to shoot lightning from your hands (Sidious) or an embarrassing track record of failure no-one can mistake (Abaddon).

5. Perfect evil laugh and twisted sense of humour.

6. Have a super bad-ass evil lair.

7. Don't melt into goodness at the sight of baskets of kittens or puppies.

8. Pretend you don't have any possible mental problems even if they are there.

9. Beat up anyone that even looks like competition.

10. Be a dick to everyone, even your own side (tough love).

11. IMPORTANT: Do something memorable. It is not enough to just do all of the above, you need to really do something unique to stand out from your peers. Sidious masterminded the complete destruction of the Jedi and the rise of the Sith to masters of the Galaxy. Sauron helped fuck up his world and make a lasting legacy of evil by creating so many evil races. Vect established the single most unpleasant city realm in the galaxy and allowed the Dark Eldar to flourish as a people. What will YOU do to get your enemies quaking in jealously and respect?

The Big Bad Evil Guy Hall of Infamy

An honour bestowed only to the most truly deserving head honchos of villainkind, not just any hireling with ideas above their station can get here!

Sauron (Lord of the Rings): The dude who originally created the term 'Dark Lord' in modern high fantasy and was willing to get stuck into the action himself too. Pretty much an undead fallen angel who wants to bring order by tyrannically ruling Middle-Earth. Once the good angels ended up destroying a continent to stop him, but that didn't work and Eru (God in Middle-Earth) told them to limit their involvement to minimize collateral damage. This time, all they did was thwart his current plan of the moment and successfully kill him off.
Darth Sidious (Star Wars): Creepy old freak who single-mindedly engineered the complete destruction of the Jedi Order and turned the galaxy on its head so he could rule it as a tyrant (and maintain the massive military industrial complex necessary to combat the Yuuzahn Vong upon their inevitable arrival into galaxy... much like another famous Emperor. Unfortunately not everything transpired according to his design). His favourite trick was using his force lightning to make toast (always too overdone).
The Timeless One (Halo): AKA The Flood and The Gravemind, came from a race of nigh-omniscient Eldritch Abominations called the Precursors that came before the Universe was born. Single-handedly destroyed an interstellar Culture-level Civilisation, the Forerunners, for insane sobbing cynical vengeant shits and giggles after it led a genocide against the Precursors, their peaceful creators now gone insane with the God equivalent of ptsd, all because the Precursors thought humans were less stuck up than Forerunners (you would think Halo would have less Grimdark than 40k in the shit that started it all story) and is now coming back in the form of a horrifying fusion of The Thing, Tyranids, and X-Parasite; so that he can force every single living thing in the Universe to "join" him in a very fucked up version of Communism, via OM NOM NOMING their bodies and souls in eternal torment and pain. This Flood also acts as a computer virus in later stages, and The Gravemind's ultimate plan is to wipe the universe clean and start over, having gone way past over-the top friendly fire several hundred thousand years late vengeance, when everyone responsible is already dead. Also proclaimed as the greatest Troll to come out of Sci-Fi since the introduction of Tzeentch and Eldrad, considering how he manage to slowly and painfully rip apart the 10 million year old culture and beliefs of the Forerunners by forcing them to do things that are both hypocritical and outright contradictory of their pacifistic religion as well as tormenting and mindraping the Forerunner's greatest heroes into deranged psychopaths. The most perfectionist of the lot and getting the most shit done.
Dracula (Castlevania): Was the big bad in the majority of the Castlevania games (Subverted for the two recent games), how bad is he? Well....when even Death considers him as "Boss", then it should tell you the power differences here in pure EVIL.
Voldemort (Harry Potter): The big bad evil wizard of the HP setting Voldemort spent most of the series as an evil spirit before coming back in a body made from a mixture in a cauldron (as you do). Countless times he failed to kill the boy who lived and twice he failed to take over the wizarding world, making one wonder about his track record.
Jadis, the White Witch (The chronicles of Narnia): The white bitch likes to freeze everything and turn you to stone at the drop of a hat if you displease her. She froze Narnia to be her perfect place but was challenged by a gang of motley kids and killed by the lion Aslan (revealed to be literally Jesus Himself taking the form of a large lion; so she was pretty badass if it took God Himself to take her out). Since then her ghost has been hiding on Earth under the guise of Sarah Palin (you thought the love of cold weather and evil politics was just coincidence did you??)
Discord (My Little Pony Friendship Is Magic): Despite the hate for a certain show about colored horses most people, even neckbeards, take off their hat to one of the villains, the embodiment of chaos, Discord. Think Q from Star Trek (he is even voiced by the same actor) except while Q was kept in check by some higher ups and only really wanted to have fun, Discord was a schemer who planned to turn the world into his chaotic playground warping the landscape and minds of it citizens. Think Alice in wonderland on crack. Was turned good in a semi-cheesy way but even then he spends most of his time fucking with people.

Yawgmoth(Magic: The Gathering): This is the formerly ordinary human that turned Phyrexia from back water plane to the nightmarish world that we all knew and loved. After his apotheosis, the Father of Machines was able to take on Oldwalkers and have a good chance of coming out on top. As such, he was to powerful to print, and some of the most powerful cards bear his name (Yawgmoth's Will and Yawgmoth's Bargain are both banned in legacy).

Games Workshops

Nagash Former Tomb King (via usurping the throne) from back when they were living humans, the inventor of necromancy, the one who caused undead factions to exist in the game and the greatest threat to the Warhammer world outside of the Chaos Gods, he even plans to supplant them. And he would have gotten away with it too if it wasn't for those meddling rats and Nurgle.
Malekith (Warhammer Fantasy): The Witch King and Lord of the Druchii, Malekith is (or was) one of the less pompous of the Big Bads of Fantasy - On his throne in the center of his evil and cold domain of Naggaroth, Malekith could see the entirety of the world, no matter where it was, but his eyes were fixed at one point - Ulthuan and the throne of the Phoenix King, which he will always strive towards. After 6000 years of civil war, started after his mother Morathi fucked up his coronation, the End Times reveals something incredible and unheard of among Bad Guys - He was the good guy! Or, the gods had chosen him like he said they had and they decided to let him retake their test. Which he passed. After retaking Ulthuan and killing Tyrion, who was possesed by the Widowmaker, Malekith was chosen as the Phoenix/Eternity King. Now the leader of all elfkind, he is the only one who can assure the survival of the entirety of the elven race...
Archaon (Warhammer Fantasy): Elected bro for life of the Chaos Gods and doer of getting shit done. Formerly a pious man until the machinations of Chaos made him go off the rails. Failbaddon lives in constant terror of Archaon getting fed up and coming to kick him out of existence.
Asdrubael Vect (Warhammer 40k): More dangerous then Failbaddon could ever be even in his dreams, Vect passes the time causing countless millions to be tortured, just for his bored amusement. Master of dick moves and getting others to get others to do his dirty work. The only thing keeping him from conquering the galaxy is Games Workshop's refusal to let the plot of 40K go in that direction. It's implied that the reason Vect was removed from the codex as a playable character is because GW was that scared of Vect changing the status quo.
Matt Ward (Games Workshop): Dark Lord of Fluff Rape and Codex destruction, his plan to unleash his hordes of ultramarine servants to take over the galaxy in a wave of blue and to subject the grey knights to eternal ass rape. He's also managed to defeat the C'tan and take control of the Necrons to aid his blue-clad minions. Few, if any are as diabolic as this man! In fact, he was so much of an evil mastermind that none of his plans were ever really challenged, and so he quit his goddamn job. As in, literally. The Throne of Defilement of Fluff and Crunch is now vacant.

Now you know.
Antagonists with crazy schemes of megalomaniac conquest and revenge upon the world, their lairs full of traps and minions...Ian Flemming might have been a good DM.