The insanely difficultSuperboss from BayonettaRodin. The reason why he was kicked out wasn't because he was doing bad things — in the Bayonetta-verse, the angels are anything but good. Instead, it's implied in his entry in the Book of Laguna that he was SIMPLY TOO POWERFUL to exist in Paradiso.
This is Implied by the cartoon character Alice Angel in Bendy and the Ink Machine. Her surname is "Angel" and she has a halo above her head, but she also has a pair of devil horns.
Champions Online brings us Therakiel, a half-angel/half-demon who wants to start the apocalypse and does, causing you to go back in time and prevent him doing it in the first place!
Class of Heroes 2 offers Fallen Angels as a class. Pahne is one of these as well.
The first game gives us the Archangel Abbadon, commander of Heaven's military forces, who was killed and dragged to hell in the prologue of the game. He was then asked if he would serve in heaven, or rule in hell. He chose the latter. Towards the end of the game, he asks War the same question. The answer?
In the second game, Death encounters many of these at the Lostlight, having fallen prey to The Corruption and losing their minds. Including the Archon Lucien, the one behind their corruption who yet still professes himself to be the holy one between himself and Death. Death is forced to put the majority of the them down with the exception of the scribe Jamaerah, who was purged of his Corruption during their battle by his own holy light and reveals to Death the Archon's duplicity.
The first was Izual, who turned his back upon Heaven and threw in with Hell, not only filling in the Prime Evils on the Soulstones and how to corrupt them, but also helping them mastermind their own exile from Hell into the mortal realm of Sanctuary, breaking the pact between Heaven and Hell made at the end of the Sin War and pretty much setting the events of the main series into motion.
On the other end of the spectrum is Tyrael. As revealed in Diablo III, Tyrael renounced his angelic status after learning that his angelic brethren, chiefest among them Imperius, cared little to nothing about Sanctuary and humanity in general and voluntarily fell to Sanctuary as a mortal so that he could aid mankind directly against the forces of Hell.
A number of angels wind up corrupted following Diablo's rebirth as the Prime Evil and invasion of Heaven in Act IV.
And as of Reaper of Souls, Malthael has returned, having become the Angel of Death. He was once the leader of the Angiris Council before the destruction of the Worldstone. He seeks nothing less than the destruction of humanity in defiance of the Council's vote to spare them, and seeks to bend the evil powers of the Black Soulstone to his will to do so. Even Imperius, the other archangel who voted against sparing humanity (and very much not a nice person), believes Malthael has gone too far and needs to be put down after the Reapers kill his fellow angels.
In Disgaea female healers are apparently fallen angels, Flonne in the best ending for the first gamealso a case of Dark Is Not Evil as she's every bit the same lovable ditz as she was as an angel, only in a skimpy outfit and a little sexier.
Available as summons in Dominions, with Late Age Marignon calling generic ones and Early Age Hinnom releasing the Grigori with the largest blood sacrifice in the game.
The Prologue of Dragon Quest IX sees your hero, a member of the angelic race known as Celestrians, falling to earth after an accident rather than losing their powers through their own actions. Later, a straighter example is shown in the Woobie, Destroyer of Worlds villain.
Dungeon Keeper 2: The Dark Angels are rare but extremely powerful late-game units — top-notch Magic Knights with offensive magic and support Necromancy, and exceptional magical researchers out of combat. Fluff text describes them as Enigmatic Minions who only join you for their own amusement, but fortunately, this has no in-game ramifications.
Meridia is a Daedric Prince whose sphere is obscured to mortals, but is associated with Life Energy, Light, and Beauty. She was originally one of the Magna-Ge, the "star orphans" who abandoned the creation of Mundus (the mortal plane) part way through along with their "father", Magnus. However, Meridia was banished from Aetherius for "consorting with illicit spectra", implied to be the Daedra. Considered a "trespasser" in Oblivion by the Daedra, Meridia, through sheer force of will, "bent and shaped" the rays of Magnus to create her own Daedric realm in Oblivion and became one of the Daedric Princes. For bonus points, she typically takes the form of a beautiful woman, sometimes with angel-like wings.
Eternity: The Last Unicorn have Skogal the Dark Valkyrie, the game's main villainess who used to be one of the lawful Valkyries defending Alfheim.
Evil Islands: The Curse sure has an appearance of one.
In Fall from Heaven the Fire Angel/Goddess Bhall fell... right through a city, dragging it to Hell with her. When she landed, she went into a coma for nearly 1000 years.
Ultima in Final Fantasy XII was originally an angel in charge of guiding souls to aid in reincarnation. Her pride led her to lead the other Espers in a rebellion against the gods. As punishment, she was sealed away in the Great Crystal of Giruvegan. She is fought there as a boss.
Granblue Fantasy features a number of these, particularly in the What Makes the Sky Blue event trilogy. Two thousand years before the events of the game, several angels rebelled against their Astral creators, though their rebellion failed and they were imprisoned in Pandemonium. The second and third instalments of What Makes the Sky Blue reveal that the rebellion and its failure were both masterminded by Lucilius, an Astral who created several angels himself and planned to use the cores of the fallen to advance his scheme to Rage Against the Heavens. Of the fallen angels introduced there's:
Sandalphon, the first fallen angel introduced in the setting and possibly the only true example by what most people would expect a fallen angel to be, as an angel that was once good and turned the darkside. By the sequel event following his introduction, he's now returned to the side of good.
Belial, one of the Big Bad's of the "What Makes the Sky Blue" storyline and the third fallen angel introduced (after Olivia was made playable but his role is more important). The fallen angel of cunning, he's a manipulative backstabber who is willing to do anything to get his way. He's also a Depraved Bisexual that can't get through most conversations without making a sex pun.
Dark Angel Olivia, an imported character from Rage of Bahamut. Unlike Sandalphon, who was formerly a primarch before his fall, she was always a fallen angel as she was created as one. She still participated in the rebellion that lead to her imprisonment in Pandemonium and is now presumed dead after her original body was destroyed along with it.
Azazel, another character imported from Rage of Bahamut, though his characterization is more in line with his Rage of Bahamut: Genesis appearance. Despite his attitude, he is one of the few fallen angels known to be on the side of good and only participated in the rebellion for what he thought was for Lucifer's sake.
Azrael and Israfel, twin messenger angels and former primarchs that went missing for hundreds of years prior to the events of the game only to return fused together in a sack and driven insane. They get better and turn out to be nonmalicious.
Sariel is a powerful fallen angel with a limiter implemented in him that stunts his intelligence while also making him more subservient. While not actively malicious, his mental deficiency makes it difficult to comprehend the difference between good and bad, which leads to him having loyalty to Belial, the Big Bad who he believes genuinely cares for him. On Belial's end, it's ambiguous if he actually does.
Growlanser IV: Wayfarer of time features a world that was nearly destroyed by angels 2,000 years ago. The angels return to once again attempt to destroy the world and it is up to the protagonist's party to stop them.
Several of the demons in Helltaker's harem are stated to be these, though outside of Lucifer and Judgement, who are confirmed to have once been angels by Justice in one of the game's sequel comics, it's unknown which ones are former angels and which ones were always demons.
It's implied in the game's epilogue that Azazel's extended time around the demons is resulting in her beginning to go through the process of falling. This gets expanded upon in the sequel comics, which show that her black hair that she shares with all the other angels is beginning to change into the Mystical White Hair all the demons have, and is also starting to grow horns. Azazel is in complete denial about all of this, however, claiming that falling is just a myth told to angels by the church to Scare 'Em Straight. Examtaker, a bonus chapter released for the game's first anniversary, reveals that Azazel eventually falls completely and becomes the demon Loremaster, then somehow manages to displace Lucifer and takes over as the ruler of Hell. She's still in denial over the idea that she's fallen, however.
Kid Icarus: Uprising: One of the early concepts was that Pit (now an adult) was cursed for thousands of years and had become a Fallen Angel due to a crime, with a tattoo bearing an inscription of said crime. This idea was dropped after a very poor reception. However, one of Pit's Palette Swaps in Super Smash Bros. Brawl shows him with a dark outfit and black wings. According to Word of God, it was made to make him look like a fallen angel. Said costume was the inspiration for Dark Pit in Uprising.
Low-ranking Angels in Nexus Clash who aren't interested in goodness can turn coat to the demonic hordes and become Fallen. Despite being half-mechanical Body Horror abominations, Fallen have the power to temporarily masquerade as normal angels and an entire combat style based on delivering the most effective possible Back Stab once they get close to their prey.
Zafkiel in Omen of Sorrow is an heroic example. She was an celestial that lost contact with heaven after spending centuries hunting monsters and demons. She does retain her agelessness and some of her powers.
The ultimate Persona in Persona 5 are based off mythological figures who were cast out of the heavens after turning against or stealing from their culture's higher powers. In fact, the protagonist's Ultimate Persona is the Gnostic version of Lucifer, the trope codifier.
Trias the Betrayer from Planescape: Torment considers himself Necessarily Evil, serving evil in order ultimately to serve good. He is relatively sympathetic, and redeemable if you have enough Charisma.
Giratina from the Pokémon games is said to have been banished by Arceus to the Distortion World as punishment for its violent behavior.
Radiant Arc: Zardon was once one of the Holy Beings, the gods who created the world. However, he turned against the others out of jealousy towards Irin and spitefully created the Moria to destroy the gods' creation. The player never gets to see Zardon's original angelic form, though his Final Boss form has black wings to hint at what he used to look like.
In Shade: Wrath of Angels, according to your benefactor and Spirit Advisor, the Angel of Faith, one evil angel called the Dark Angel is the instigator of a massive war between angels and demons, after being tired of several millennia of peace, with the Angel of Faith being the war's remnant. Your quest have you retrieving the souls of other angels in order to release your brother who was taken by the Dark Angel, but turns out the Angel of Faith is that Dark Angel herself.
In Solium Infernum, you are one of the demon lords fighting to become the new Devil after the old one disappeared.
Sword and Fairy 7 features a rare non-Christianity-inspired version. So-called "Heaven Demons" are Deities who rebelled against the Council of Angels, and fled to Devildom, where they were corrupted by local "evil air". They serve as the main antagonists of the game. Except not really. Dark Is Not Evil is in effect here, and they have a pretty legitimate reason to invade Human Realm.
Trillion: God of Destruction: The principle cast of the game are all Fallen Ones or descendants of those whom followed Satan when he rebelled against God, and thus were banished to the Underworld.
View from Below: The Crimson God tried to teach humanity love and kindness as Jesus, but when they crucified him, he renounced his ideals and swore revenge on all of humanity. God stripped him of his divinity to punish him for his lack of faith, leaving him as a blood-red demonic being.
In The World Ends with You, the post-game Secret Reports describe an Angel who fell by violating their code and revealing to Minamimoto how to create Taboo Noise. Only in the very last reports do you learn this Angel's identity — Sanae Hanekoma, the same one writing the Secret Reports in the first place.
In the World of Warcraft backstory Sargeras was originally one of the Titans and had the duty of destroying or binding the various demonic races. Over time the evils he witnessed drove him mad and he created the Burning Legion to destroy all order in the universe.
The Doomguard, members of the Burning Legion, were created as servants of the Titans, tasked with policing the use of arcane magic and eliminating anyone who used forbidden magic. Sargeras broke them free from the Titans and they now view their past existence as slavery.
