The Ragnarok OnlineIdle GameRagnarok Clicker introduces Arcana the Novice, Mageanger the Mage, Eden the Acolyte, Lela the Archer, Dagahr the Thief, Randi the Merchant, Ward the Knight, Jess the Wizard, Phyllis the Hunter, Dawn the Assassin, Maven the Alchemist, Priest Felicia, Crusader Elliott, Clare the Sage, Elena the Dancer, Denise the Rogue, Sheol the Ninja, Ruby the Blacksmith, Taekwon Girl Hannah, Valkyrie, High Wizard Magdalena, Zeal the Gunslinger, High Swordman Randell, High Priest Eliza, Ashley the Biochemist, Fauna the Scholar, Taekwon Boy Daniel, Drake the High Wizard, Deidre the Gypsy, Marco the Paladin, Sable the Stalker, Tanya the Champion, MasterSmith Rupert, Lidia the Paladin, Emory the Minstrel, High Priest Osvaldo, Arden the Sniper, Brant the Stalker, Lord Knight Dario, and Assassin Cross Eremes.
Star Wars before the "Legends" decision had quite a few of these from the various games:
Star Wars: Galaxies introduced the Force Sensitive Village of Aurilia, Vader's failed apprentice Mellichae, The Meatlumps and their King to name a few. These canonical additions, among many others, have been cited in other Star Wars mediums.
Another Star Wars canon foreigner, Kyle Katarn, is perhaps one of the most prominent video game-based canon additions from the Jedi Knight series who has spawned his own books and action figures.
The Force Unleashed lets you play as a canon foreigner! Notably, TFU was envisioned as a "multimedia project" (e.g. making all of the tie-ins that would surround a full Star Wars movie release without actually making a movie) similar to the earlier Shadows of the Empire, but with the video game as the "main event", so to speak, rather than the novel being the headliner as with Shadows.
X-Wing— and particularly its sequel TIE Fighter —featured a plethora of new spacecraft and spacecraft designs in pivotal roles. Several went on to become canon, such as the Interdictor Cruiser, the TIE Defender, and the Assault Gunboat.
The original characters in the Street Fighter EX series are owned by Arika, the company that developed the game, instead of Capcom. When the developers realized this, they retconned the backstories for Doctrine Dark, Pullum Purna, and Garuda to distance them from the canon Street Fighter cast (for example, Garuda, who was originally a demon created by the Satsui no Hadou, was now a manifestation of evil energy). Several characters were later put in a non-Capcom related fighting game called Fighting Layer and its followup, Fighting EX Layer.
There's also Captain Sawada from both versions of the Street Fighter: The Moviegame, as well as Blade and his palette swaps from the arcade version. Interestingly, Sawada and Blade are both included in the character guide on Capcom's official website, seemingly implying that they are acknowledged as part of the Street Fighter universe, even though they've never appeared in any of the canonical entries in the series.
Star Trek: New Worlds introduces Federation, Klingon and Romulan military organizations in charge of colonizing worlds with ground vehicles including tanks and artillery, mentioned nowhere else in Star Trek or the Star Trek Expanded Universe.
Aska from the SNES version of Tournament Fighters. She was created to fill in the gap as the token chick, since the other females in the game were the final boss Karai and Damsel in Distress April O'Neil (though she did fight in the Genesis version). However, early builds of the game shows that her name was originally going to be "Mitsu", who was the heroine in Teenage Mutant Ninja Turtles III.
Sisyphus the mutant beetle from the Genesis version of Tournament Fighters was never in any other TMNT media, although its easy to think otherwise due to the number of anthropomorphic characters that were introduced to the toyline in later years.
The various third-party Mega Man (Classic) productions add characters that would never be seen again — all of the bosses from the PC games (.EXE renamings and coincidentally same-named bosses in later games notwithstanding), several characters from the Ruby-Spears cartoon, Akane and Yuuta from the OVA, Dreamwave's three "boss characters", etc.
Mega Man: Fully Charged features new Robot Masters such as Hypno Woman, Blasto Woman, Chemistry Man, and Chaotique, as well as new main villains Sgt. Breaker Night and Namagem (who is a combination of Proto Man and Bass).
Castlevania: The character from Wai Wai World's Castlevania stage is Simon Belmont III, descendant of Simon Belmont, according to descriptions in two Wai Wai World guidebooks.
Castlevania: Bloodlines has John Morris, son of Quincy Morris from Bram Stoker's Dracula, and John's son Jonathan Morris in Castlevania: Portrait of Ruin, suggesting the events of the novel take place in Castlevania's timeline. John's 1895 birth date is a little late to fit well with the novel's ending, not to mention completely at odds with Quincy dying without children, unless events in this timeline happened differently.
The insidious House Ordos from the Dune RTS games by Westwood Studios.
The Dino Defender in Jurassic Park III: Dino Defender and Jurassic Park III: Danger Zone! has not been mentioned outside of the games.
Turned on its head in The King of Fighters 2002 Unlimited Match: the new character Nameless was created specifically to take the place of K9999 from KOF 2001, who was such a blatant ripoff of Tetsuo Shima that SNK Playmore had trouble using him in later games without an outright overhaul.
The King of Fighters EX and Maximum Impact sub-series, both falling squarely under Alternate Continuity, feature their own original faces, more than a few of whom could feasibly be inserted into the main canon with little (if any) alterations to their backstory. One example is Xiao Lon, the half-sister of Hizoku assassin Duo Lon, who was created with the intention of loosely linking together the original titles and the MI series while avoiding plot holes (her debut in Maximum Impact: Regulation A, an Updated Re-release of MI2, also featured Ash Crimson, a former teammate of Duo Lon's from the "Tales of Ash" arc that covered KOF 2003, XI, XII and XIII).
Reika Kirishima, one of the playable characters in Castle of Shikigami III, was originally the star of her own Laserdisc and Sega CD game called Time Gal. She was also a playable character in Elevator Action Deluxe.
Wolfduck was a villain that only appeared in the Darkwing Duck video game.
The Metal Gear canon excludes all the original characters from Metal Gear: Ghost Babel and the Metal Gear Ac!d games. If you wish to go further, there's also Twin Shot, one of the replacement bosses from the NES version of the original Metal Gear, as well as John Turner and Nick Myer, Snake's FOXHOUND comrades from Snake's Revenge (as well as the "Metal Gear 2" mecha from the same game).
Teliko and Venus from the Ac!d games did, however, make cameo appearances as playable characters in the canon game Metal Gear Solid: Portable Ops. In that game, they were described by the other characters as 'aliens'.
Definitely Vermon CaTaffy and Higharolla Kockamamie from the NES Metal Gear games. Although neither character actually existed to begin with (both were added into the US instruction manual as jokes by some translator at Konami who thought theirself significantly funnier than they actually were).
One of the more extreme examples would be Nicole-458 from Dead or Alive 4, who doesn't appear in any work from the Halo universe she comes from. She's supposed to be a member of the second class of Spartan-IIs, which happens to be one of the few remaining elements from I Love Bees that neither Bungie nor 343 Industries seem to have yet truly adopted as canon.
In Batman: Arkham Asylum, Batman meets in the titular asylum canon foreigners Frank Boles, Doctor Young, and Warden Quincy Sharp. As canon foreigners, they are allowed to be killed, as Boles and Young found out when they stopped being useful to the Joker... Warden Martin Joseph of Blackgate Penitentiary and Warden Ranken of Iron Heights Penitentiary from Batman: Arkham Origins and Batman: Arkham Knight respectively are also created for their respective games. The creations of Sharp, Joseph, and Ranken also led Jeremiah Arkham, Victor Zehrhard, and Gregory Wolfe, the respective people in charge of Arkham, Blackgate, and Iron Heights in the comics, to be Adapted Out.
Spider-Man: Shattered Dimensions has a few, mostly in the form of the Hammerhead from the Noir universe (the developers said that he felt like a perfect fit and he did fit quite well), 2099 Hobgoblin, and a female Dr. Octopus from 2099. There's also the DS versions, which have Noir versions of Calypso and Boomerang, and a 2099 version of Silvermane (who's technically Silvio Manfredi himself, still alive thanks to being a cyborg).
The Amazing Spider-Man features cross-species versions of animal based Spidey villains, and newcomer Nattie, a piranha infused with human DNA. The name is based on the subject’s scientific name, Pygocentrus nattereri.
The NES version of Willow includes the village of Dew, the blacksmith of Dew, the Chief of Dew, the Chief's father Bogarda, Adik and Abang of the Eagle Clan, the dragons Po and Matanda, Kchil of the Nail Clan, Muzh, the spirit Zhena, the Spirit of the Skies, and the Spirit of the Earth.
X-Men: Destiny revolves around three teenage mutants created exclusively for the game: Aimi Yoshida, Adrian Luca, and Grant Alexander. Aimi is the daughter of Sunfire, who is an actual character in the X-Men and Uncanny Avengers books. For the DS version of the game, the plot instead revolves around Samuel Kamerhe, former right hand to main antagonist General Reyes.
In her Resident Evil novelizations, S.D. Perry introduced Trent, a renegade member of the Umbrella board of directors. His role was to fill all the glaring Plot Holes in the games by pulling strings from behind the scenes and assisting the heroes while sabotaging Umbrella's plans.
The two original Resident Evil novels, Underworld and Caliban Cove, were written back before the release of Resident Evil 3: Nemesis. Two of the characters introduced therein, John Andrews and David Trapp of the Exeter S.T.A.R.S. unit, have a small fan following and occasionally appear to this day in fanfiction.
Due to being retconned, anything having to do with the original SNES Star Fox and the unreleased-for-24-yearsStar Fox 2 were rendered non-canon. Two new pilots from 2, Fay and Miyu (a poodle and a lynx, respectively), are considered foreigners. With them is Fara Phoenix from the Nintendo Power comic adaptation of the original game.
All the main characters in Discworld Noir. Canon characters such as Gaspode and Nobby Nobbs are limited to secondary roles. There is certainly no indication in the books that Lewton, or even the profession of Private Detective, exists.
The Simpsons Arcade Game gives us all the bad guys in the game except for Mr. Burns, Smithers, the wrestler boss, and the drunk boss.
The fan-made Streets of Rage Remake gives us the female ninja Rudra, who serves as a boss character (depending on which path you take in the story) and is also an unlockable character. Interestingly, she started out as a joke sketch which the artist posted on a forum and claimed that she was Shiva's sister, but a lot of fans didn't get the joke and thought she was real. During the fan-remake's development, Rudra was going to actually be Shiva's sister, but prior to the final draft's development and release the creators went in a different direction with her, turning her into more of a mercenary character who works for the Syndicate as a hired assassin.
In War in the North, there's the main party of Andriel the Elf, Eradan the Ranger, Farin the Dwarf and their Great Eagle companion Beleram. There's also the Big Bad Agandaûr, one of the chief lieutenants of Sauron.
The Lord of the Rings: The Third Age gets the same treatment with their own main party: Berethor the Gondorian soldier, Elegost the Ranger, Hadhod the Dwarf, Eaoden the Rider of Rohan, Morwen the Shield-maiden, and Idrial the Elf.
Then there's Battle for Middle-earth II. Both the original and The Rise of the Witch-King. Especially for the Evil Armies - including the Goblin King Gorkil, Hwaldar the Wildman serving under the Witch-King, Drogoth the Dragon Lord, Rogash the troll, and Karsh a celebrated Hero turned Leader of the Great Plague. Create-a-Hero mode has the The Lord of the Rings: The Third Age characters Berethor, Hadhod, Morwen and Idrial as starter heroes.
The multiplayer-focused RaymanSpin-Off game Rayman M introduced the characters Tily and Razorwife and a new robo-pirate model, Henchman 1000, none of whom have made any appearances in the main series.
Saiyuki: Journey West adds several totally-new characters to the cast of the traditional novel, like the dryad Lady Kikka and most of the secret characters.
In Ultima, Escape from Mt. Drash introduces the Garrintrots, Runes of Virtue introduces the Black Knight, Ultima Forever introduces Lady Garriott, Ultima Underworld introduces a bunch of characters, and Ultima Online has its own Alternate Continuity characters.
South Park: The Stick of Truth reaches far back in the source series' history to fill its roles with familiar minor characters, even those long discarded, but still introduced a few new characters. The New Kid and their family are obviously new additions, as are many of the antagonists, including the Hallway Monitors, and the Big Bad Government Guy, as well as the Gnome Warlock, complimenting the existing gnomes. Many of the Canadian characters are also unique to the game, although the Bishop of Banff closely resembles a different character in the show.
The recurring Chris Donnely character, a blonde member of the Elves, was originally set to have a bigger role as a boss character at the Inn of the Giggling Donkey, but was reduced in the final version of the game. Unlike the other main child characters, he is never seen out of costume. He made a cameo on the show in the "Black Friday" trilogy with no lines.
The "Recruit the Girls" quest introduces Monica Ryland and Jessie Rodriguez, and the former has made background appearances in the show since the game's release. Monica's boyfriend Jake is also a new character.
The Walking Dead (Telltale) mostly inverts this, being focused on an original cast with some appearances from canon characters; Hershel Green and Glenn appear in the first episode of Season 1, while Jesus Monroe appears and plays a key role in three episodes of Season 3. The character of Lilly who's featured prominently in the first three episodes of Season 1 was intended to be the Governor's associate Lilly Caul, but when the game's backstory for her was contradicted by canonical novels, she was retconned into also being an original character.
Shin SD Sengokuden Kidou Musha Taisen is a PlayStation realtime simulation RPG that acts as a bridge between Shin SD Sengokuden Chou Kidou Daishogun Hen and Chou SD Sengokuden Bujin Kirahagane Hen, with characters from Shin SD Sengokuden Shichinin No Choushogun Hen added in for good measure. In the game you can pick one of three different protagonists to play as, including Tsukikage Gundam, Hien Gundam and Ryuuko Gundam. Said three protagonists are not from any of the three SD Sengokuden series featured, and instead were made exclusively for this game.
Shrek SuperSlam: Black Knight, G-nome, Quasimodo and Luna do not come from the movies. Red Riding Hood and Humpty Dumpty do have counterparts in the main universe, but they're considered separate characters from the SuperSlam versions. Quasimodo is especially worth noting since he isn't even a fairy tale character, originating from literature instead.
Shrek Smash N'Crash Racing: Goldilocks makes her debut in this game, but hadn't appeared in any of the films until Puss in Boots: The Last Wish, in which, like Red and Humpty before her, she is a very different character.
The PC-Engine version of the first arcade game gives us the nameless navigator for the Striders' side, and the nameless desert commander and tank pilot for the Grand Master's side.
Tarzan: Untamed: Oswald Gardner originated from this game. He's an amoral discoverer who wants to bring Tarzan and Jane to London as specimens for study.
Tatsunoko Fight: Astral Chameleon, a gestalt of the souls of the criminals killed in Hurricane Polymar, never originated from the anime itself and was created to ensure there was an "Arch Rival" to Hurricane's "Hero" and Teru's "Supporter", as with the other characters.
Ys II Special, a Korean-only game, gives us Arisa and Aisha, both of them being elves. The latter is not to be confused with Aisha from the canonical Ys SEVEN.
Ys IV: The Dawn of Ys gives us Arem, the Lord of Slaughter and the true master of the Clan of Darkness in the game.
Taito's Ys V remake introduces Aisha, an Eldeen who shares her name with the abovementioned character from Ys II Special.
Madagascar: The Zoohunter, Wilbur, and the fossa king.
The unnamed protagonist and all the other non-boss duelists have from Magic: The Gathering – Battlegrounds have never appeared in the card game it's based on. The bosses however are straight from the card game.
Officially, the Ghost Face Killer in Dead by Daylight is not a license of the Scream franchise; he's a fully original character named Danny Johnson who operated in states between Utah and Pennsylvania rather than Scream's primary setting of California. However, the writers did everything they could to evoke that series, giving him a backstory steeped in technology and social media, along with a themed costume which evokes the simple Halloween store outfit of the movies. And considering the films have never had the same person don the Ghost Face costume in multiple installments, it's fitting for this Ghost Face to also be unique.
Marsupilami: Hoobadventure: Most of the main cast are downplayed examples. The 3 playable Marsupilamis are original characters, but still Marsupilamis, making them somewhat half an example. The game's antagonist, an evil Mayincatecskeletal ghost is a straight example, however.
Wishbone and the Amazing Odyssey: The duck, which Wishbone remarks on ("Somehow, I don't remember reading anything about a duck in The Odyssey.").
, descendant of Simon Belmont, according to descriptions in two Wai Wai World guidebooks.