Albion: Demons are magical creatures deliberately created by wizards for use as living weapons by giving form to their fears. The list of fears they came up with for the game isn't very imaginative or sensible, as the only demons in the game are Fears, Animals, Plagues, and possibly Storms.
Arcana Heart's demons are pretty much like your traditional demons. You know, comes from hell, could get summoned with a ritual, has horns and wings and fangs... well, besides the fact that all the demons we've seen so far are generally good, cheerful sorts with the most evil one being the Jerk with a Heart of GoldMike. Oh, they're considered so much of an Unusually Uninteresting Sight amongst humans that they can legally get married to human women and receive jobs in the corporate world while their obviously half-demon children (complete with little wings and fangs) go to school and become friends with the local Miko (who will nonetheless note to said friend that there are certain rules against demons threading on their shrine). There is even one that is a nun.
The Sarkaz of Arknights are a race of humanoid people with sharp, demonic black horns and rarely wings. However, just like the Sankta, they're like any of the other Little Bit Beastly races of the setting, and in fact the word "demon" is a Fantastic Slur for them. In later content, it is shown that "Sarkaz" is actually a catch-all term for people based on many classic monsters, which includes demons but also vampires, gargoyles, liches, and dopplegangers.
The demons in BAD END THEATER all live in a castle located dangerously close to a human village. They appear as humanoids with pointy ears, horns, tails, and a varying numberof eyes, and they have a reputation for being violent and treacherous. They fight and kill using their claws and teeth, and are implied to have at least some magical abilities.
The Infernal Demons in the Bayonetta franchise are beings based in Darkness, not Evil, however both Dark Is Not Evil and Dark Is Evil varieties do exist. Madama Butterfly, the demonic lord that Bayonetta has her Deal with the Devil contract with, for instance, has only ever been shown to completely loyal to her, and even shares a fist bump of friendship in the sequel when some of Bayonetta's demons start turning on her just to show she's still as trustworthy as ever. Visually, most demons appear beastlike or as Big Creepy-Crawlies, but some of them introduced in the second game look mechanical in nature.
Bendy and the Ink Machine has the Ink Demon. He's very Abrahamic in nature in that he is black (and white - of course) and has two horns at the top of his head. What sets him apart? He's a Toon. Or the firstfailed attempt to bring make a cartoon character a reality anyway. His name, Bendy, isn't exactly fear-inspiring, probably because he was meant to be the protagonist of a light-hearted cartoon series. However, since being brought to life, he's become an Eldritch Abomination with powers such as super-strength, teleportation, and being a Walking Wasteland. He's also Nigh Invulnerable with his only weakness being the end card to his cartoon.
Whether the extremely bizarre-looking monsters in The Binding of Isaac are supposed to be demons given the religious themes in the game or just simply a case of Our Monsters Are Weird is up to interpretation, although the game does have its fair share of clearly demon-based monsters. Examples include Loki, who looks like a stereotypical Big Red Devil apart from the four arms and imp-like behavior, Dark One who has a darkness-basedmotif, Lilith who is a blindfolded Cute Monster Girl, and pretty much all the Devil Deal familiars with their diverse designs and powers.
Bloodstained: Ritual of the Night: With every being in the castle, except the possessed humans, coming from Hell, then the inhabitants are all technically demons. So those giant floating dog heads are as much a demon as those of the more traditional Big Red Devil lineage.
Infernal is a demon, or at least a half-demon, as well. His mother turns out to be Lillitu, the Succubus Queen.
And that's only the official demons in the game lore. Good luck trying to count all the types of demon and half-demon player characters running about.
Clive Barker's Jericho is set in "The Box", a sort of nightmarish dimension which God created to act as a prison for a Humanoid Abomination called the Firstborn. Every once in a while, the Firstborn attempts to escape The Box by using gullible humans as it's pawns, and it requires seven powerful warriors skilled in the supernatural arts to seal it back again, but doing so takes the pawns, the warriors and a piece of reality with it. The pawns, the warriors and any unfortunate goons taken along with the slice of reality are trapped forever in The Box, and if- no, sorry, when they are killed in there, they are brought back as hideous, insane abominations by the Firstborn.
Demons are the most aggressive type of spirit the player can encounter in Conrad Stevenson's Paranormal P.I., and the only one to be actively hostile toward the player. Their presence in a location is usually foreshadowed by reports of people in it suddenly acting strangely and aggressively, and evidence of demonic summoning can always be found in their haunting places. When manifested demons will often try to chase the player, causing the player character to briefly pass out if they catch up to him. They can be banished from a location, but the process is fairly complex: Exorcising a demon requires knowledge of its true name, the particular lord it serves and the human vices it seeks to exploit.
In The Council, Daemons exist among humans as a sort of wave-form consciousness which house themselves in human minds. While born as humans for the most part, they eventually develop the ability to hear thoughts and transfer their consciousness into other bodies, as well as causing the bodies they currently inhabit to age much more slowly. Also, while they are not necessarily evil by nature, and in fact view themselves as benefactors toward humanity, their methods of "guiding" human society involve controlling them from the shadows.
Darkstalkers uses demon as a term for monsters that are extremely powerful.
In Dark Souls there are several varieties of demon, and all of them were birthed from the Bed of Chaos, which is what the Witch Izalith became after a magic ritual went wrong.
In Dark Souls II, none of the demon enemies from the first game show up, likely because the Bed of Chaos is long since dead. There are three bosses called "demon": the Covetous Demon, the Smelter Demon, and Demon of Song, all of which with different origins; the Covetous Demon is a Demon of Human Origin, the Smelter Demon is either a metal automaton that killed its own creator or an ancient being that was dug out from below, and the Demon of Song is a man-eating froglike demon with no concrete origin story. If any have a connection to the Bed of Chaos is unknown, but Black Knight weapons don't do extra damage to them like they did to demons in the first game, so it seems unlikely.
In Dark Souls III, the Flame of Chaos is dwindling like everything else, leading to the demons gradually dying out. By the time the game takes place there are only a few demons left.
Demon's Souls: All demons spawn from the Old One, a giant plant monster with a mindless hunger for souls. They take on a variety of forms, ranging from conventional monsters to Humanoid Abominations. They can manifest from nothing, take possession of corpses (like the Dragon God and the Old Hero), can be humans turned into demons (like Boletaria's Knights and Maiden Astraea) and can even manifest in the forms of human belief (the Adjudicator and the Storm King originally gods from the Shadowmen's faith).
The lesser demons are Always Chaotic Evil, while higher devils are not. The latter may occasionally do a Heel–Face Turn because of that, like in Sparda's case.
Appearance-wise, just about every demon is completely different to each other and the sheer variety of what's classified as a demon is a little mind boggling. Living Puppets and Scarecrows? Demons. Human-sized lizards with shields and armour? Demons. Angelic suits of armour? Demons. Giant plant snake lady? Demon. Cat made of darkness? Demon. Flying whale? Demon. A clown? Demon.
Certain individuals also have demonic blood mixed with their human nature, but gain a full-on demonic appearance when using their Devil Trigger. Dante and Vergil are draconic humanoid lizards in their devil forms, while Nero's physical Devil Trigger in Devil May Cry 5 resembles a Japanese Oni with spectral wing-arms. These aforementioned characters are all descendants of Sparda, yet they don't exactly replicate all of Sparda's features in demon form, who's sort of an insect/ram/lizard/bat humanoid.
In DmC: Devil May Cry, demons can disguise themselves as humans and blend into society.
Trish's powers work differently compared to the part-demon descendants of Sparda. She can easily channel lightning from her hands, her Devil Trigger state just gives her a yellow/golden aura instead of physically manifesting a monstrous form (she even does it stylishly by wearing sunglasses), and she can completely alter her appearance, including her natural hair and skin color under the guise of "Gloria". On top of these abilities, she's a demon specifically made by Mundus to resemble the twins' mother, Eva.
In the Diablo setting, demons are psychotic hordes sometimes created or altered by their leaders, the Prime Evils and the Lesser Evils. Even though they seem to have free will, they still do the bidding of their particular masters without question. They come in a huge variety of forms — from almost-human to green porcupines to the Blob to totally alien. In the second game, many enemies are not true demons, but creatures mutated by the forces of Hell. Killing demons primarily sends them back to Hell, which is the reason that the Soulstones were created — the angels needed a way to keep the Prime Evils from returning.
In the first game as well - the undead are not demons but corpses animated by the power of the Prime Evils, and the weaker creatures like Scavengers are mutated once-natural animals.
Doom's monsters are invaders from Hell. They either take a monstrous physical form or they possess humans who become zombies, and some of them, such as the Cyberdemon, the Spider Mastermind, and the Mancubi, have cybernetic enhancements. There's no particular special weaknesses to use against them; lots and lots of firepower will do the job perfectly, though some of the more powerful ones require the use of magical weaponry like the Soul Cube to put down permanently (in practice this just means they can be revived elsewhere if magic isn't used - their physical bodies can still be destroyed like anything else). Doom (2016) and Eternal go into more detail about what they're like. They create a powerful energy source known as Argent Energy and their modus operandi is to invade worlds that have been baited into trying to harvest Argent, subsuming them and turning them into further extensions of Hell. The demons themselves are the empty bodies of dead sinners converted into monstrous forms after their souls have been extracted and turned into Argent Energy. This is all part of a huge, corrupt Celestial Bureaucracy set up by the current Khan Maykr where Urdak is given a steady supply of Argent Energy in exchange for the Khan Maykr looking the other way as demons conquer the worlds that are supposed to be under Urdak's guidance.
All demons in Dragalia Lost are the creation of the true Big Bad of the game, Xenos, and he has purposefully made them Always Chaotic Evil. The demons' needlessly cruel and destructive nature were meant to mock Xenos' rival in creation, Bahamut, and his ideals in chaos, free will, and possibility, as a mocking representation of such ideals. Not all demons ended up going along with what Xenos wanted of them, with one particular demon being more interested in creation and protection rather than destruction, and this demon became the archangel Metatron, who led other demons rebelling against their original purpose against other demons. The archdemons that still embody their purpose of desecration and destruction are present in the game as The Sinister Dominion.
Demons in Dragon Age: Origins are denizens of the Fade that long to experience mortal life and are defined by different emotions: Rage, Hunger, Sloth, Desire, and Pride. To this end they frequently attempt to possess mortals, mages being their ideal targets. (Mages are self-aware while visiting the Fade and a possessed mage becomes a new creature called an abomination.) Some of Anders' and Justice's dialogue in Awakening hints that any spirit of the Fade can become a demon if their desires become too strong. This is likely the reason Justice is both fascinated and disturbed by the love that his deceased host Kristoff and his widow Aura shared — the desire for such a thing could very well turn Justice into a demon.
This is demonstrated in Dragon Age II, where Ander's hatred of Templars has turned Justice into a demon of Vengeance. Anders can let Vengeance take control of him as a sustained ability; he will do more damage in this state, but can't be healed.
Dragon Age: Inquisition explains demons in more detail while adding new varieties. Spirits are very simplistic beings with a singular purpose, and become demons if that purpose is somehow corrupted. For example, a non-violent spirit of Wisdom was transformed into a demon of Pride when it was bound and forced to kill to defend its summoners. It is alarmingly easy for spirits to become corrupted when encountering mortals.
Dragon Quest II: Belial is a winged, pointy-tailed, cow-headed, yellow-skinned demon. Bonus points for being armed with a trident and breathing fire.
Dragon Quest V: Bjorn the Behemoose is a humongous, fat, bat-winged, goat-like demon.
Dragon Quest VIII: One of the first things to be seen in the Dark Ruins is an imposing statue of a bewinged goatlike purple-skinned demon, distinctly modeled after the classic Baphomet. Cameron's Codex in the 3DS version indicates it to depict a former incarnation of Rhapthorne.
Dragon Quest IX: Morag has wings and a tail and... grasping claw-tentacles. Also has some moderate undertones of lustful demon.
Demons in Dwarf Fortress are physically an extremely varied lot - procedurally generated beasts (as are Titans and Forgotten Beasts), ranging from horrible amalgamations of mundane animals with uncanny features such as three eyes, composed of things like ash or snow or what have you (though immune to fire and temperature regardless), with terrible poisons that will do anything from causing mild itchiness to making your eyes rot - but they all fly and ALL want to rip you to pieces. And there's more of them in Hell than there are ants on Earth. Sometimes they hijack human civilisations by tricking the inhabitants into believing they're a god, or goblin civs by means of brute force.
The Elder Scrolls series has many divine beings taking many forms and moralities. The closest to "demons" would be the lesser Daedra (singular "Daedroth"). The Daedra, meaning "Not Our Ancestors" in the old Aldmeri language, are the pre-creation beings ("et'Ada") who did not participate in the creation of Mundus, the mortal plane. Thus, unlike the more angelic Aedra, they did not have to sacrifice any of their divine power and thus, remain truly immortal.note The term "demon" is used, but is detested by in-universe scholars as a popular mistranslation of "Daedra" The 17 (formerly 16 prior to the events of Oblivion's Shivering Isles expansion) most powerful Daedra are known as the Daedric Princes. Each has a particular sphere of influence, which are said to govern from their planes of Oblivion (the infinite void surrounding Mundus) which they inhabit and rule. Neither the Princes nor the lesser Deadra are inherently evil, with them tending to operate on Blue-and-Orange Morality which is Above Good and Evil. (Though they certainly can and are viewed as good or evil by mortals, depending on how benevolent or malevolent their actions toward mortals are being perceived at a given time.)
The lesser Daedra range in intelligence (and thus sentience) from animalistic (Clanfear, Daedrothsnote a bi-pedal crocodilian form of lesser Daedra with a confusing Non-Indicative Name, etc.) to somewhat intelligent (Scamps, Ogrim, etc.) to full-on sapience (Dremora, Aureal, Mazken, etc.) Many of these lesser Daedra are aligned to serve a specific Prince or Princes, such as the Dremora being most commonly in service to the Daedric Prince of Destruction, Mehrunes Dagon, serving a role as his legions of hell. Like their Prince superiors, lesser Daedra are fully immortal as well. While they can have a physical body summoned to Mundus and that physical body can be slain, their spirit simply returns to Oblivion to coalesce in a new form. Lesser Daedra can be unaligned as well, as is the case for the Atronachs, who are essentially living Elemental Embodiments. All manner of lesser Daedra can be summoned to Mundus, often in service to mortal wizards and conjurers. While this is viewed as "cleaner" than necromancy, it is still frowned upon by the non-magical community for the same reasons communing with demons is frowned upon in other works. (Corruption, black magic, "gates to hell", etc.)
Another form of lesser Daedra are the Demiprinces, products of the union between a Daedric being and a mortal. To put it loosely, they are the ES universe's "half-demons". For those sired by the Daedric Princes, such as Fa-Nuit-Hen, the scion of Boethiah (the Daedric Prince of Plots, Conspiracy, and Betrayal), they often receive their own pocket realm of Oblivion to govern. (Without getting into extremely esoteric lore-speak, they aren't so much true "children" as they are "fragments" of their divine parent's being.)
In Exit Fate, Demons are humans who have an astral spirit bound to them through a ritual. They are immensely powerful as Your Mind Makes It Real is in full effect (as such, they are as powerful as they believe themselves to be). Unfortunately, Sanity Slippage is almost inevitable as they go mad with power and lose all sense of morality. Although they will retain their humanity for a while, eventually they lose themselves to their demonic nature. Individuals who are bound while still in their mother's womb tend to fare better, apparently...
Final Fantasy XI's demons are of the summoned-and-serve variety that serve the Shadowlord, although it seems they originated from Odin, a Celestial Avatar.
Final Fantasy XIV has the Voidsent, which are generally of the summoned and serve variety, though they tend to be working towards their own ends while "serving". They are creatures from a realm called the Void and vary between mindless beasts and fully sentient and intelligent. The mindless beasts serve but the intelligent ones form "pacts" with their summoner. It's later revealed that the Void is actually a "reflection" of Eorzea which fell to darkness. The voidsent were actually the citizens of that world and the stronger ones are implied to have been its Warriors of Light, like the player character is to Eorzea. There seems to be a hierarchy to them which In-Universe scholars have tried to define but not even player-made attempts fit what we are shown. The most that can be made out at this point is Diabolos is very high in the hierarchy and there are multiple queens, as both Scathach and Lilith have both been referred to as Void Queens.
Final Fantasy XV has "daemons", monsters of various forms that emerge after the sun sets. Daemons are repulsed by strong lights, which accounts for their nocturnal habits, but also renders them unable to enter major settlements due to the strong lights blanketing them. In truth, daemons are animals and humans that have been infected by a parasitic plague known as the "Starscourge" which converts the mass of its victims' bodies into a "plasmodic miasma" that mutates into a monstrous form.
Karel in Fire Emblem: The Blazing Sword is known as the "Sword Demon", but despite his name and bloodlust, he's actually a good guy, and later abandons it in favor of "Sword Saint" or "Saint of Swords", also known as "Kensei" in the original Japanese.
In the continent of Teyvat in Genshin Impact, 'demons' refer to the lingering resentment and hatred of dead gods. They don't seem to take physical form, instead possessing living creatures and causing abnormal mutations in the flora and fauna. In the backstory of the game, the Five Yakshas were tasked by the Geo Archon to fight against demons.
Demons in Grim Fandango are specifically created with no other desire than to perform a specific job for undead souls. If they're barred from doing said job, they'll literally waste away in misery. Most of the demons encountered don't exactly look like traditional demons, anyway, more like big monsters.
Given the Guilty Gear games' continuous use of Christian motifs, the titular Gears loosely fit, as they play on many aspects of Christian demon mythology. They're not from Hell and they don't serve any Satan analoguenote Although Justice did come close to being a Satan analogue (as they are manmade artificial magical creatures using genetic engineering), but they do have various supernatural powers, tend to switch between looking absolutely monstrous and looking nearly human, work under bigger and more powerful Command class Gears (which serves as a stand-in for the Demon Lords And Arch Devils), and have a weakness towards certain magical and holy weapons. Gears usually also have mental problems ranging from anti-social personalities to full-blown misanthropy and delusions of grandeur, though some Gears don't want to hurt anybody and in fact can be fairly decent people, as is the case with Dizzy, Testament and Sol Badguy. They are being hunted down by a Christianity-based order, their general appearance and their One-Winged Angel forms make them parallel traditional demons, and can mate with normal humans producing have half-Gear children (complete with Gear features and possessing a One-Winged Angel form).
Helltaker is an Indie Game about a man, the titular Helltaker, traveling to Hell to assemble a harem of demon girls. While the general depiction of the demons seems to take after the biblical depiction of demons, instead of taking the form of monsters, they instead appear as beautiful women dressed in red and blacksuits who, outside of the horns, tail, red eyes, and Mystical White Hair, look like ordinary people. The only exception is Beelzebub, who is a fly-like Animalistic Abominationuntil the secret ending, where she shapeshifts into A Form You Are Comfortable With as another suit wearing woman. Several of the demons are named after biblical demons (such as Lucifer, Modeus, and Beelzebub), while others are named after beings from other mythologies (such as Cerberus). They also aren't particularly evil, being Punch-Clock Villains at best and Affably Evil at worst. Fallen Angels also exist in this world, with Lucifer and Judgement being confirmed as former angels, and the game's sequel comics show that the angel Azazel is going through the process of falling, seen with her growing horns and her black hair (which she shares with the rest of the angels) turning white. By the time of Examtaker, a bonus chapter released for the game's first anniversary, she's fallen completely and become the demon, Loremaster.
Inkulinati: Devils are hairy humanoids with horns, leering grins, and an extra face where their behind should be. They can fart fire out of their butt-faces to create permanent areas of flame, and specialize in using hooked or saw-edged weapons that inflict bleed effects. They are heretics by default, meaning that they take extra damage from the attacks of a bishop or a three-haloed Beast, but are immune to fire and will not be eaten by Hell's Maws.
League of Legends: 'Demon' refers to a being that embodies a sin and enjoys causing misery. Three champions are demons:
Evelyn, the Agony's Embrace, takes the form of a beautiful humanoid woman and entices people with lust- only for them to find out that her idea of a one-night stand is to hideously torture her partner to death, as their pain is her pleasure.
Nocturne, the Eternal Nightmare, is a shadow magic (yes, the kind of magic Zed uses) construct who eventually became a demon, and in his hatred of everything else, destroyed every other living thing there, and then he moved on to feeding on humans. He's currently trapped in there and can do nothing- but the spirit world is the one contacted in dreams, and if a mortal has a nightmare, he is drawn to that fear, and if the nightmare lasts long enough, he will be temporarily freed to go after you. The one silver lining is that he's too wrathful to ever stop and let you recover- once you die, then that's it.
Tahm Kench, the River King, looks like a catfish in nice clothes and a top hat, and takes after the legends of the devil as a con man. He appears before someone who's in dire straights and offers to take them somewhere to fulfill their heart's desires. What he fails to mention is that their end of the bargain is that he will eventually get to devour everything they've gained. He thinks the despair and misery they feel is the tastiest part.
After the most recent wave of Retcons, Fiddlesticks is the oldest demon - a creature of pure, primal fear. It barely even seems to be able to formulate sentences, being too inhuman even for that or any pronoun other than 'it'; most of its voice lines are echoes of other people's last words, creepy nursery rhymes, the names of other demons it encounters and so on. The most worrying implications are possibly in the line "Fid-dle-sticks, End of Men; Fid-dle-sticks, First of Ten"; even if we count Evelynn, Nocturne, Tahm Kench and Raum as being among these "ten", that's still only five demons. What are the other five like?
The Darkin aren't considered demons, but are a variation on the archetype. Once Ascended of Shurima - essentially lesser gods - the war for Icathia broke most of them, and over time they became the twisted and evil Darkin, making them, for all intents and purposes, fallen angels. They were then trapped in weapon form, and most of them were hidden, with only three currently active: Rhaast, Varus, and Aatrox. Aatrox, the only one to have truly broken free, even resembles the classic Big Red Devil, with ornate horns, leathery wings, and red light everywhere; he's an Omnicidal Maniac.
Demons in Lusternia are extraplanar entities that were corrupted by the effluence of an Eldritch Abomination, ruled over by a council of similarly corrupted Demon Lords. They come in four varieties: slimy, greedy little imps; androgynous, sex obsessed fiends; crimson skinned classic demons; and hulking, winged Archdemons. They can be trafficked with, but only by Nihilists.
The Matrix: Path of Neo has three programmed, sword fighting, Horned Humanoid demons of the Chinese/Japanese variety at the end of the third sword training level.
The Ing, from Metroid Prime 2: Echoes. They're born from an alternate, "Dark" plane of reality, and seek to destroy the light one. They can't survive in the light plane, so they possess various creatures in order to carry out their goals. Light-based weaponry is very effective against them. In their standard forms, they look like monstrous spiders or tentacles, and they can transform into an amorphous sludgy puddle to escape or evade attacks. They are malevolent, animalistic, and pose a threat to anyone who gets in their way. They are definitely aliens, but they are also demons in all but name.
Might and Magic have had multiple types of demons and devils since the beginning of the series. The first were powerful hostile creatures with no apparent connection to the later ones in the same 'verse, while the second type, introduced in the sixth game of the RPG series and third game of the strategy series, was a race of invading aliens properly called Kreegan but called devils by mortal races because some of them looked like mythological devilsnote And who happen to be the reason why the Ancients lost contact with the local arm of the galaxy., with demons being simply one of their subspecies. The Ubisoft-verse has another story altogether.
In Monark, they are called "Daemons", supernatural beings who reside in the "Otherworld", a parallel dimension to reality as mortals know it. They are separated into Legions, generic, low-level daemons that are used as cannon fodder and servants for the rest, Nobles, more powerful Legions that have earned some notoriety but are still subordinate to the most powerful type, Monarks. These last ones are each based on one of the Seven Deadly Sins or "abberants" outside of them, and have the unique ability of forming "Pacts" with humans. In exchange for them granting their supernatural "Authority" powers, the Monarks can now manifest and wreak havoc on the human world, primarily through spreading supernatural, insanity-inducing "Mist" wherever their portals to the Otherworld and their "Ideal" crystals (the anchors and conduits of their power) are being stored.
Mortal Kombat: Demons are the native inhabitants of Netherrealm, the franchise's equivalent of Hell. It is said that good people cannot enter Netherrealm, so demons are assumed to be Always Chaotic Evil. The true forms of demons are appropriately demonic and monstrous, though they can assume human forms through practice. The most monstrous demons are known as oni, and this category includes Moloch and Drahmin. Quan Chi was originally an oni, as well, until he began studying sorcery. A few demons have tried to chart a life towards good; Ashrah, for instance, used to be as demonic-looking as other demons, but she "repented" by becoming a Hunter Of Her Own Kind, which purified her enough for her to be banished from Netherrealm, and now she looks like any other human.
"Hellspawned Demons" are among the species in Mutant Football League. Physically they resemble the Big Red Devil archetype, though skin color can vary depending on the team. They're Lean and Mean, with no stomachs and long, scrawny arms, and alwayscreepily smiling because they have no lips or cheeks. They're immune to fire damage and their wings give them a huge vertical leap, making them great defensive backs and receivers, but they have the weakest Healing Factor of any species. This means demons at RB are Fragile Speedsters and you should be wary about overusing them, and demon quarterbacks are injury prone so you'll want to have deep reserves.
Demons in Nexus Clash start out as mortals cursed by the forces of Good for their wickedness, who learn to subvert and shape that curse and make pacts with greater Evils to become beings ranging from seductive tempters to scheming demon lords to nigh-unstoppable behemoths to gibbering tentacle-spawning freaks. The variation is because different sorts of demons get their powers from different Dark Powers, who all hate each other and can't agree on what exactly a Demon is.
Fiends in the Ninja Gaiden series are a supernatural collection of malevolent beings spawned by dark deities that used to rule over mankind during The Dark Times and serve as primary foes to Ryu Hayabusa. They come in many diverse forms, shapes and sizes as recorded by ancient humans in myths, legends and folklore by cultures all over the world such as werewolves, vampires, humanoid feathered beings, tentacled abominations and so forth. With that said, the term "demon" is a specific to only a large bulk of their species that had originated from the underworld, trace their origin to the deities that spawned them and are completely inhuman in nature; fiends also include mutants and undead, that were all formerly animal and human beings that were twisted and turned into beings that serve them.
Onimusha has two examples: the evil Genma and the benevolent Oni.
The Genma were a demonic race born out of chaos from a God of Evil known as Fortinbras and they serve as primary antagonists in the entire series. Absolutely evil, its said that humanity was just created to serve as livestock to them, so much that their historical battles are referred as "hunting expeditions". They are a diverse bunch that come in all shapes and sizes as well as capable of converting humans too - low-ranked corpses are animated into Genma soldiers and the most famous example was Nobunaga Oda, who made a deal with Fortinbras to come back to life as a demon and conquer Japan in his behalf.
The Oni, on the other hand, were a benevolent kind of demons that intervened on behalf of humanity and fought against the Genma, but they were defeated. However, they were able to leave behind a few descendants and empower several warriors to slay their hated enemies. The Oni are way less seen than their enemies despite their name being in the series' title, but they usually manifest themselves as spirits of light and at least once as a masked and horned figure. Actual Oni characters do appear though, with Takajo being a half-serpent woman and her son being Jubei Yagyu while the fourth game's hero Soki is revealed to be the reincarnation of an Oni god.
Houndour and Houndoom are Dark/Fire types based on hellhounds. Mega Houndoom takes it even further by actually looking like the type of canine creature that would be featured in artistic and pop culture depictions of Hell.
Hoopa Unbound has six arms, six ribs, and six prongs extending from its abdominal ring. Coupled with its horns and tail, Hoopa Unbound is just as much a demon as it is a genie.
Pony Island: They're specially-programmed AI named after famous demons, made to guard the core files from deletion. Whether or not the actual demons they're named after are inhabiting the program is up for interpretation. The only obvious "real" demon is Satan himself.
Both Pio and Tia from Potion Maker the only known demons in the game, are winged humanoids with pointy ears. It is also mentioned that their physical growth is slow, albeit Tia is an exception.
After a human dies, it is said that the body can be possessed by a demon with a strong enough grudge against the world.
In Primal the inhabitants of all worlds except for earth are called demons. Only the wraiths and djinns have a real tendency towards evil, and even among them there seem to be some people who are quite okay. The udine and ferai are actually rather nice people, and none of the demon races look in any way demonic.
In Pyre, demons are one of the many races which inhabit the Downside. They are hulking figures with enormous horns, and in the Rites they move slowly but project a massive Aura which makes it difficult for other Exiles to get past them. Despite their menacing appearance, they are no more likely to be evil than anyone else. As it turns out, all demons are former humans: people who spend too long in the Downside become warped by it, growing larger and sprouting horns. Those demons who manage to leave the Downside and return to the Commonwealth will eventually revert to human form.
In The Secret World, demons are the native inhabitants of the Hell Dimensions, and they appear in a wide variety of forms: the almost-human hellsoldiers, the scuttling quadrupedal Rakshasa, the winged succubi, the hulking incubi, and the mercenary Oni. However, they're not an evil people by nature, just desperate: their dimension was created as an experiment by the Host and ultimately rejected in favor of Earth, leaving them cut off from the life-giving Anima they needed to survive; without it, demons have been reduced to stealing it through dimensional portals, or prostituting themselves to human mages in the hopes of claiming the anima in their souls through Faustian Pacts. Unfortunately, they've also been conquered and enslaved by Eblis, and he's been able to exploit their desperation and turn them into an army he can use to invade Earth.
In the Shin Megami Tensei franchise, "Demon" is actually a catch-all term for any supernatural being ranging from goblins and fairies to gods; even angels are technically one specific type of demon (though they'd probably be very angry at you if you called them thatnote In Shin Megami Tensei Liberation: Dx2, the archangel Phanuel responds that she "would prefer not to be called such a revolting word."). Demons in general are still very bad news for unwary humans, despite not all being horned monstrosities straight out of a Doom game. This goes back to one of the original meanings of the word, simply "spiritual being." Technically the original word was "daemon", but close enough.
The Deadly Six from Sonic Lost World belong to a race of demons known as Zeti. They live on a floating continent known as the Lost Hex, and have the ability to manipulate electromagnetic fields.
Spelling Jungle: They're called "Tricksters" in the manual, but Demons in the game, and two of them are effectively Elemental spirits (the Fire Trickster, which shoots fireballs, and Wind Trickster, which blows Wali around). The third is the Dart Trickster, which shoots arrows at Wali.
In Spud's Adventure, Devi looks like a small winged imp, and he is mortal just like anyone else.
Super Mario Bros.: Bowser himself could be considered one, seeing as he has the title of Daimaō ("Great Demon King") in Japan.
Paper Mario: The Thousand-Year Door has several beings that fit the defenition of "demon" much better. Most notable of them all is the Shadow Queen, a thousand year-old demon who possesses Princess Peach and plans to engulf the world in darkness.
In Tales of Symphonia: Dawn of the New World (and, by extension, other games in the same continuity) Legions of Hell are a barely-seen, but always looming threat, that's sealed in the world of Niflheim by Summon Spirit Ratatosk. In the original Tales of Symphonia there is a sidequest in which the party briefly visits Niflheim, and fights numerous demons inside. Notably, both major bosses inside are some kinds of Animated Armor, while post-GameCube versions also include Living Memories of Fallen Heroes of the past. Dawn of the New World also features someone making a pact with demons, but it doesn't appear that this character is corrupted by it in any way.
Tales of Zestiria has hellions, which are called daemons in the prequel Tales of Berseria. Both of these terms are catch-all names for humans, animals, seraphim/malakhim, or even inanimate objects, corrupted by so-called "malevolence", a substance born from negative emotions of humans. If malevolence is purged from the hellion's body, it will return to normal. They can take a variety of forms, ranging from a mild case of Red Right Hand, to mythical monsters, to more bizarre shapes. Hellions can use magic, are impervous to most mundane weapons, and have a large Healing Factor. They are also Invisible to Normals, appearing to most people as the vessel before the transformation took place. While most of them are very aggressive and attack everyone on sight, hellions of human origin may retain their personality, if they are strongly focused on a specific goal. Meanwhile corrupted seraphim turn into dragons, the most powerful kind of hellions, lose their minds completely, and can't be purified. In general, Zestiria casts hellions as Always Chaotic Evil enemies, while Berseria introduces several demonic allies, and gives them more depth, showing that they can be pretty decent people.
Touhou can be a bit complicated. To begin with, there are creatures called akuma in Japanese which is translated as devil; additionally vampires are a type of devil. Oni may also be a type of devil; some are said to work in the Celestial Bureaucracy and others live in an abandoned hell underground. (Note that the Japanese word for vampire contains the character for oni). All of these have been referred to as types of youkai (but clearly not all youkai are devils). It gets more complicated with the existence of Makai (literally Demon's World). It's apparently not hell, but it's said to be inhabited by demons in the translation, which may/may not be different from devils. It should be noted that Makai is ruled over by an obvious Satan analogue but she is in fact described as being a God, and having created the place.
In ULTRAKILL, there's no doubt that Hell is full, but its infernal denizens are a far cry from the Big Red Devil. Instead, they're statue-like creatures made of stone and flesh with diverse shapes, appearing as expressionless disembodied heads supported by transparent Spider Limbs (Malicious Face), featureless humanoid statues that hibernate in a Thinker Pose (Cerberus), and horrific scorpion-shapedabominations with flesh bursting out of the stone exterior (Hideous Mass).
In Valdis Story: Abyssal City, "demon" refers to a human that has sold their soul to the Dark Goddess Myrgato. Lower-ranked ones are barely different from humans, while the generals have either taken or been given enough souls to become monstrous and powerful.
On the one hand, there are Eldritch Abominations referred to as the 'Old Gods' or 'aberrations' but never as 'demons' per se (even though they are just as evil and just as old as anything you might want to call a demon).
On the other hand, a whole menagerie of your typical horned and/or hoofed and/or tailed and/or bat-winged humanoid demons together with an assortment of many other nasty things comprise an organized army of demons called the Burning Legion, originally created by a corrupted deity who went mad after fighting too manyEldritch Abominations.
Some of these "true" demons were originally natural species, such as the Eredar, that were corrupted and inducted into the Burning Legion, others, such as Voidwalkers and Abyssals, spontaneously generated out of the twisting nether, or the void or other sources of powerful arcane and fel magic. Many demons in the legions are also cybernetic or entirely artificial constructions; like giant magic robots powered by demonic energy.
The Draenei invert more than one trope related to demons, like Fallen Angel and Ascended Demon. They are a good guy race and not demons, but look somewhat like demons (hooves, horns, etc.) because they are those Eredar who never "fell".
The mechanics of the games categorizes all NPCs into a limited number of groups that can interact with specific spell types. Demons, Aberrations, and Elementals are all distinct categories mechanically.
Demons in the first three Wild ARMs titles. In 1 and 3, they are cybernetic beings from outer space, with bodies made of living metal and nanomachines. In 2, the main demon is a personification of destruction due to the world slowly being eaten by Another Dimension, and said personification resides within the main character.
There are also dream demons, which are made of electric currents and tend to appear in people's dreams to manipulate them into certain courses of action, or just feast on their dreams to the point the target does not want to wake up.
