Major Outsiders To Appear In The Campaigns

While several others aside from the ones listed here have been mentioned or have sent minions or cultists to wreak havoc, this list is limited to those non-servitor entities who have actually shown up on screen in person.

Additions/Corrections are welcomed within that scope.

The Outer Gods

The Outer Gods are the most powerful and usually the most primal of the Outsiders. While the Great Old Ones tend to be associated with a particular place and realm, and have limited power outside of it (Ithaqua is not at his best trying to manifest in a rain forest or burning desert, Cthulhu is locked in R'lyeh, and Cthugha would probably not enjoy being summoned at the bottom of the ocean), the Outer Gods tend to embody sweeping, universal things and can interfere anywhere that the Walls of Night are weak enough to allow. Thankfully for the universe as a whole, it is a lot easier for cults to bring forth a GOO in its true power than an actual Outer God.

Azathoth

Closest thing the Outsiders have to a leader, the roiling nuclear chaos at the center of the Void. Probably the most potent of the Outer Gods, and possibly even their parent. He is said to hold the portfolio of creation, of the random, purposeless, meaningless sort.

Defeats:

Azathoth stood on the sidelines and watches as his team got horsewhipped in the Battle of Cathuria. He launched comet-spawn against the defenders, but the only one to make it in time was diverted by Chloe, Asuka, and the Wind Dragon.

Daoloth.

The Render of Veils, a strange being composed of unspeakable geometric forms, frequently metal or plasticlike. Daoloth is the sort of god who thinks three dimensions are far too few for comfortable stretching, and his portfolio tends to be one of how objects extend between different dimensions, including the past and future.

Victories:

During the battle for the HOS KUGAR, Daoloth was summoned by KUGAR on their 'bridge' to fight against the forces of Shiori, Orien, Sousuke, and company. He successfully grappled Kurz and Yomi, crushing their Armslave and stealing away Yomi when she had passed out.

Defeats:

Daoloth's nature made him the ideal Outer God to use Yog-Sothoth as a jump point during the Battle of Cathuria. He was immediately attacked by the Serpent, who fought him to a standstill until first Motoko and then Chloe's group rained additional beating on him, sending him spiraling off into the Void in a state of deep hurting.
Ever Yog's Number Two Boy, Daoloth was second in line to come through the Gloom Device's rift during the Logruswrack. The rift was closed by Chloe and Tohru before he could make it through.
An artifact that may or may not have been linked to Daoloth was purchased by Team Orien on the eve of their Violator Eyehunt -- when they went to see Fuyutsuki about it, it was fried to dust by the power of Primal Patternscanning.
Also, during the battle of the HOS KUGAR, the summoning circle used to bring Daoloth into the ship was broken by the combined efforts of Sousuke and Katherine. As he dissolved and retreated, a combined strike by Shiori with an amplified Sign of the Fire Pattern, Katherine with her Spikard and borrowed Logrusfoil, the Holy Tree of Akasha with Mega Vine Power, and Kaname with the Main Gun of Princess Water Wanding prevented Daoloth from stealing away Kurz as well. It also sheared the HOS KUGAR in half.

Ghroth, Who Passeth In Darkness, the Black Moon, the Harbinger, Nemesis.

A huge, moonlike god whose appearance in the sky signals doom, rust-colored, with a single red eye which it can close to avoid detection. Ghroth's appearance in orbit has the effect of waking up all sorts of nasty things sleeping in the vicinity, and his presence may well weaken or distort the Walls of Night. He is also tied to music, and sings a siren song sometimes referred to as the 'Music of the Spheres'.

Victories:

Ghroth appeared in the sky over Amber on the Day of Darkness, eclipsing the moon and causing the Ember Air Fleet a great deal of trouble.

Defeats:

Due to the closing of the Gate of Revolution, Ghroth packed up and left.
Baited by the Grand Dance of the Stars--the ritual by which the Soumas were to be freed from their curses and the Zodiac conspirators would take new roles in the current reality--Ghroth tried to disrupt proceedings, but got Stooged repeatedly into a containment unit, too shocked to resist. OWNED BITCH.

Nyarlathotep. The Herald of the Outer Gods, Soul of the Outsiders, Crawling Chaos, and God of a Thousand Masks.

The most human-seeming of the major Outsiders, it seems possible that Nyarlathotep was once a Sidar, Elder God, or some other being tied to this world. He was in many ways the most dangerous of the Outsiders, as he was capable of subtler thought and viciousness than his peers.

Victories:

Nyarlathotep appeared in the fullness of his power on the Day of Darkness, walking over the Pattern and watching it dim and fail beneath his feet.

Defeats:

Of course, shortly thereafter his body was destroyed and his essense trapped by the Childen of the Elements and Gideon of Avalon. He became the first and possibly only major Outsider to die in the campaign.

Shub-Niggurath. The Black Goat of the Woods With a Thousand Young, the All-Mother (not Utena).

Shub has several forms and is fairly mutable, but most frequently appears as a giant mass of flesh or plant life with many orifices. Her portfolio overlaps with Azathoth in the area of mindless creation of life, but she is perhaps better known as governing (or failing to govern) physical desires and lusts, from sex to eating to binges of any type. Plants also tend to fall into her sphere of influence. Her most noted servants are the Dark Young that she frequently gives birth to.

Defeats:

Blown into many Shub-bits by Chloe, Asuka, the Wind Dragon, and the Phoenix during the Battle of Cathuria. Survived, but needs to pull herself together.
Shub was revealed to have failed to destroy Ygg during the War of the Gods, partly due to the future's Chloe's unwilling use as a Shub-snack.

Yog-Sothoth. The Key and the Gate, the Master of All, Pimp-Daddy of the Outer Gods.

Frequently appearing as a cluster of bubbles, each containing a galaxy, Yog's portfolio deals with correspondence and the universality of all points. Wherever You Go Is Yog might be his motto. As a result, Trump is pretty much his bitch. It also appears that he has some strong connection to sorcery, and may have been associated with the Master Spikard in some fasion. Yog has proven to be one of the more persistant and enterprising of the Outer Gods, and in keeping with his nature is usually the first one through any major breach of the Walls of Night.

Victories:

Yog successfully captured Miki of Amber during the Annadil Crisis and enslaved his mind. Although Miki was eventually freed, some sort of curse remained to linger on his bloodline (although other Outsiders such as Shub and Azathoth may have contributed to this).
Yog's finest hour was his tricking and capture of Suzuka, allowing him to enter the universe, nearly destroy the Logrus, and reduce most of Chaos to a pile of corpses and twisted rubble. It was easily the greatest victory of the Outsiders since the War of the Gods.
Yog was soul-branded by Suzuka with her name. This counts as a Yog victory from his POV.

Defeats:

Yog lost Miki to a rescue party led by his sister Kozue, Juri of Avalon, and Madoka.
Yog's attempt to enter the world via the hole left by a collapsing construct was stopped by the Serpent, Davros, Motoko, and others.
Yog was gut-shot by Tomos at the end of Logruswrack, and then beaten up by the Serpent and Narwhal.
Yog was generally mauled during the Battle of Cathuria, including being soul-branded by Suzuka, and was last seen fighting Y'golonac.

The Great Old Ones

The Great Old Ones are subordinate in power to the Outer Gods, although it's not as if there is exactly a unified chain of command. Many of them have a solid tie to the universe in the form of a particular place or race, and when dealing with such have a great deal more power to manifest in the world. While not quite as powerful as the Outer Gods, the mightiest of them are still strong enough to fight an Animal God to a standstill. And then there's Rhan, who... isn't.

Atlach-Nacha, Nightmare-Weaver, The Weaver In Darkness.

Atlach-Nacha is a giant spider. He likes, amazingly enough, spiders. Lots and lots of spiders. His blood flows with paralytic poison, and he enjoys sucking his victims dry.

Defeats:

The Derith-Outsider tried to feed Kentaro to Atlach-Nacha, in order to give it enough power to breach the Embran Dome. A hunting party led by Akari and Chloe stopped him just in time; Atlach-Nacha's avatar died on the same lance used to kill Shub at Cathuria while Asuka hacked him up.

Cthugha. The Living Flame, Burning One, Second Sun.

Cthugha is a big ol' ball of flame. He likes teh fire. Served by the Fire Vampires. LOOK OUT, AKARI!

Defeats:

Cthugha made a personal appearance during the battle with Jadis' forces. He lost.
Cthugha entered the Battle of Cathuria through the handy gate that was Yog, and managed to hold his own against Daffyl and the Alicorn for a while. He was eventually compresed into a neutron star and used as a projectile weapon against Daoloth; last seen spiraling dazed into the Void.

Cthulhu, Great Cthulhu.

Our buddy, who sleeps in his house at R'lyeh until the Stars Are Right. Cthulhu looks like a rather dumpy giant with huge batwings and a squid for a head. He is served by the Deep Ones.

Defeats:

Cthulhu rose out of the sea to attack Amber on the Day of Darkness, only to have a Semi-Functional Abyss Submarine tossed at him by Falme. In great embarrassment he retreated to R'lyeh.
Cthulhu was summoned by Kuonji during the rescue of Beowulf and Jacqui and Co. from the Void during the latter part of the Herald Crisis, in order to be used as a target for the then-out-of-control-Radiant's firing of its main Abyss gun. He blew up, and presumably retreated to R'lyeh again to nurse his wounds and think over this entire 'go up against the Abyss' thing.

Glaaki, The Dweller in the Lake, "Sluggy free? Lance."

Glaaki appeared as a slug covered with many metal-tipped tentacles, which it would jab into people. They would then become Chosen of Glaaki, zombies under his command. Glaaki lived at the bottom of a lake, and enjoyed dark wet places. He was also a noted author, having written the best-selling Revelations of Glaaki.

Defeats:

Glaaki was curbstomped and imprisoned in a bottle by Akari, Anthy, and Chloe. He was handed over to Fuyutsuki to be permanently destroyed, making him the second major Outsider to be obliterated instead of merely sent back to the Void. Ghroth's appearance at the Grand Dance of the Stars almost enabled Glaaki to bust out, but the subsequent capture made him expire instead. Sucks to be Glaaki.

Ithaqua, Wendigo, The Wind-Walker.

A huge hairy cannibal giant, Ithaqua is connected with cold, wind, the north, madness, and cannibalism.

Defeats:

Attempted to get in the way of Lian and Kanna's trip to Cathuria. Failed.
Possessed Orien's body when Sousuke's team yanked it away from KUGAR; he was driven out by breaking the White Sign allowing him to manifest, and plugging the Outsider pinhole he drew energy from. Left behind two dozen widdle Wendigos, who got nuked when the team blew up KUGAR's base.

Kamazotz, Camazotz, The Snatch Bat, The Terror That Flaps In The Night, The Bat-God of the Yucatan.

Kamatotz is a big ol' bat. He flies. He is a large and evil flying mouse with wings. He is served by bats, has the dark powers of all bats, and is possessed of batlike might. Did we mention the bats? Kamazotz is supposed to suck the blood of his victims, and his bite can inflict disease.

Defeats:

Kamazotz got utterly crushed by Sousuke's team in the Blue Crystal Caverns by a combination of sonic disruptions, musclebombing, getting his wings pulled off like an insect in the hands of a sadistic 7-year-old, being drunk by a vampire, and undergoing invasive exploratory surgery by multiple Primal blades going stabbity-stab simultaneously. Goodbye, Batboy.

Nyogtha, Dweller in Darkness, The Thing Which Should Not Be, Haunter of the Red Abyss.

Nasty burrowing wormy creature, served by spawn which burrow up inside a person and remote-pilot them. One of the few Outsiders who seems to not mind the Abyss.

Defeats:

Team Shiori rescued Vash from the Abyss, defeating Nyogtha in the process.
Chloe and Nanami barely prevented him from being summoned into the world during Moebius' Option Zero strike on the Black House.

Rhan-Tegoth, He of the Ivory Throne, Kooshball, Spiny Norman.

Most pathetic of the GOO, he sleeps beneath Arden, periodically waking to get his ass kicked. He appears as a somewhat furry sea-urchiny-crabby thing, large but not massively so, and fairly speedy.

Defeats:

Just being Rhan-Tegoth counts as a defeat.
Spiny Norman has been mauled by Lucien in UnS and by Nanami and Tomos brigade in F9R.
Things that may or may not have been Rhan-Tegoth or his close spawn were hacked to bits by Tomos, Orien, and Juri at various points in time.

Shudde M'ell, Giant Worm Dude

Shudde M'ell is one of the bigger guns of the GOOs. His physical form is that of a gigantic worm a mile long, with tentacles around his mouth. He is the ruler of the chthonians, who are themselves quite potent as a servitor race. It is not immediately clear if he is just an extra-large version of one of them and got to be their king because of that, or is in some manner a different sort of creature and is thus a GOO.

Defeats:

Called up at KUGAR's Last Stand, he was unable to save the merry little band of villains from getting eaten by Primal Chaos dumped directly into their control room. His attempt at avenging them right after also did not go too well, as he was blasted open by Pattern-backed weaponry, had his blood turned to acid, had the acidic blood turn into vicious butterflies that ravaged his skin, got strafed more by energy guns and starship exhaust ports, then getting hit by six redirected Primal Chaos missiles which reacted particularly explosively with his Pattern-charged acid blood. Nanbara then used one of his Rhoan-capturing bottles (super big gulp sized) to suck him up and prevent an escape to the Outside. Buh-bye.

Tsathoggua, the Sleeper of N'kai, the Toad-God, Zhothaqqua, Sadagowah.

A big ugly black toad, patron of several servitor races of the Outsiders. Tsathoggua's main claim to fame as a GOO is that he is not Rhan-Tegoth; he is far from being one of their big guns.

Victories:

It is unclear what drinking Tsathoggua will do to Tohru; this may count as a victory for him.

Defeats:

The Child Clad in Night, his High Priestess in Leng, was slain by an Amberite squad led by Random and Suzuka.
Tsathoggua assaulted the walls during the Battle of Cathuria. He put up a fight vs the Elder Gods, but was tag-teamed by Kyou and Tohru, the latter of whom drank his blood and reduced him to a pile of disintegrating sludge. It is unclear if Tsathoggua survived this treatment.

Y'Golonac, the Violator, the Defiler.

Y'Golonac is the patron of corruption and perversion in all things. He appears as a headless giant with mouths in various parts of his body.

Victories:

Y'Golonac managed to put three Eyes into the universe; they showed remarkable staying power, given the other crisises that distracted the royal family at the time. He even managed to briefly take over Melnibone via one of them; the destruction of this second eye obliterated Orien's right arm. It will not grow back again until the Violator is destroyed.
Y'Golonac wound up with Kanako's soul after her death; given his nature, it is likely that he was the one who engineered or took advantage of her corruption with Outsider Magic.

Defeats:

Y'Golonac has lost all three of his Eyes, lost many or all of his flunkies in Melnibone, and had his minions spanked in House Tremere before they could complete their plans to take over the house and the original Lord Tremere. Go team!
Y'Golonac lost Kanako's soul during the Battle of Cathuria. Suzuka wrested it away from him while Y'Golonac was distracted first by Dierdre and Akari, and then by Chloe tricking Yog-Sothoth into attacking him. Y'Golonac was last seen fighting a jealous Yog.

Appendix: Destroying Outsiders for Dummies

According to common wisdom, what we see of the Outsider Gods in our universe isn't the whole thing; it's more like someone poking their finger into a fishbowl to molest the goldfish. Huge amounts of Primal-based damage can destroy the manifestation of the god into the universe, but they can return again when the stars are right or the Walls of Night grow thin. Thus, most victories against the Outsider Gods have been merely temporary.

To date, four (possibly five) Outsider Gods have suffered apparently more permanent defeats:

Nyarlathotep, imprisoned after he manifested fully on the Second Day of Darkness and pounded out of existence over time.
Glaaki, imprisoned after the battle with him in the Blue Crystal Caves, and handed over to Fuyutsuki for destruction.
Ghroth, imprisoned by cosmic-level Stooge-Fu after he attempted to disrupt the Grand Dance of the Stars.
Shudde M'ell, imprisoned by a Rhoan Bottle Trap after getting thoroughly whooped by the large anti-KUGAR strike team.
It is possible that the vampiric draining of Tsathoggua by Tohru at the Battle of Cathuria has permamently destroyed him.

The common thread that can be seen throughout these (excluding Tsathoggua for the moment) is imprisonment and a concerted effort of destruction over time. If an Outsider God can be pulled fully into the universe from the Void and restrained, or if they manifest in their full power within the universe because of particular circumstances, it does appear to be possible to permanently destroy them. Great amounts of power are necessary for both the imprisonment and the destruction--Pattern and Logrus appear to work the best, and Elder God power due to its special opposition to the Outsider Gods.

So, in summary:

Trick, force or rely upon the hubris of your Outsider God to make them manifest fully in the universe.
Stuff them into a bottle.
Pound said bottle over time with the metaphysical equivalent of a big hammer.