BattleTech (2018): The Player Character is almost always one of these; minor nobility who starts the game washed up in a miserable little corner of the periphery. In every instance, your noble title is in name only, as you have no connection to anything of value such as family estate or coffers for a variety of reasons (you're exiled, the family was wiped out in a betrayal or accident, your family squandered it all and took their own lives out of shame, etc.). All you have starting out is your grit and the family BattleMech.
Breath of Fire II: Nina is the disowned princess of the kingdom of Wyndia. By the time the party finds her, she's comfortable enough boarding at the school of magic she attends. Because her father the King sent her there and pays for her housing and education. She was excommunicated to save her life.
Crusader Kings III: Characters' clothing depends on the rank of their title (if they have any) or that of their spouse's. Landless nobles with no land-owning immediate relative will dress the same as lowborn commoners, implying this trope.
Cyberpunk 2077: A V from a corporate background is essentially the genre equivalent of this trope. They start off as an executive in the Arasaka MegaCorp — essentially the most privileged position in the setting, — but fall victim to an incompetently executed courtly intrigue-slash-corporate power play, thrown under the bus by their superiors, and stripped of everything but clothes on their back. With the help of their streetwise friend Jackie Welles, V then starts over from zero, taking on odd jobs as a mercenary in the underworld of Night City.
The noble origin stories in Dragon Age: Origins. As a dwarf, you are accused of treason and stripped of everything, despite being the king's son/daughter. As a human, your rich, amazing family and those loyal to you are slaughtered.
The Hawkes start off as this in Dragon Age II, due to their uncle Gamlen having squandered the Amell wealth by the time they arrive in Kirkwall. The first act of the game is focused around obtaining enough riches to be able to move your family from the slums.
According to "World of Thedas", this is Sister Petrice's backstory. She comes from an aristocratic family, but they lost their holdings when she was young. Her determination to scale the Chantry hierarchy is likely her way of reclaiming the power and influence to which she feels entitled.
Final Fantasy Tactics has Argath, who is deeply resentful of commoners for this reason.
If you pair up every female character in the first half of Fire Emblem: Genealogy of the Holy War, the vast majority of the second half's playable units end up being these thanks to Sigurd's army of Holy Blood inheritors being either wiped out or driven into hiding. Larcei and Scathách are part of Isaach's royal family, but they had to be raised in hiding within their own borders due to its occupation by The Empire, and both dress like common swordfighters. Those who aren't part of La Résistance to start are generally eking out a living as thieves, sellswords, or knights errant.
In Fire Emblem: Path of Radiance, Greil was once General Gawain, one of the Four Riders of Daein, which implied that he was of noble birth because commoners were not allowed to become generals at the time. This is partially a subversion, in that Greil willingly threw away his family name (as opposed to his family name being all he had left), and the fact that he had once been a general of Daein, let alone a noble of Daein, is hardly ever mentioned.
Implied in Queen Hellene's background in Fire Emblem: The Blazing Blade. She and her old friend/distant relative Louise are mentioned to be very minor nobles, but she is lucky enough to get into an Arranged Marriage to King Desmon of Bern. Louise is genuinely luckier and ends up Happily Married to Lord Pent.
Ricken's family in Fire Emblem: Awakening. He comes from the lower aristocracy of Ylisse and his Blue Blood house is currently bankrupt. He joined the Shepherds to try and regain some honor for his family name, specially after having been abused by other young nobles until Prince Chrom took him in. Maribelle, a fellow noble from a higher station, tries to cheer him up by telling him to take solace in his blue blood, no matter the state of his finances.
Ingrid's family in Fire Emblem: Three Houses, since the lands they hold are not good for agricultural use. As a result, Ingrid's father often made sacrifices so that his daughter would be provided for, and while Ingrid doesn't want to commit to an Arranged Marriage for the Galatea family's financial gain, she realizes she's indebted to her father.
From the same game is Constance von Nuvelle, whose house has all but been ravaged that she's the only one left standing and lives in the Abyss. Her main drive in life is to regain the noble status of her house in any way possible, something which she constantly reminds to everyone present to flaunt her nobility.
The Legend of Heroes: Trails in the Sky: First Chapter: In Act 2, you learn that the mayor of Ruan is from an aristocratic royal family, but he blew all of his family's money on gambling until he's broke and in debt, a fact that he's desperately trying to keep hidden from the public. When you run into him again in the following game, after he was ousted as mayor he opened a shop in the city of Grancel, intending to make his family's money back the slow but honorable way. From the same series, the Capuas are nobles whose fortunes have fallen so far that their title was revoked. Their assets consist of a single airship, which they use to go into piracy. After going straight, they become freight haulers.
The Legend of Zelda: The Wind Waker has an unusually optimistic example. On Windfall Island, there is a rich man whose daughter Mila has been kidnapped. He's a bit stuck-up, but he says he'll do anything to get her back. She is rescued by Pirates, who demand an enormous sum for her return, which he pays. He ends up dirt-poor and living in the streets, but he's happy because his daughter is back. He plays a direct Foil to a Nouveau Riche man on the same island.
Mana Khemia: Alchemists of Al-Revis: Roxis Rozencrantz is the latest descendant of a long line of famous alchemists, his family hasn't produced a worthwhile alchemist in a century or so, and in one scene, he mentioned that his father earned the money they lived on by playing cards. He's at Al-Revis to redeem his family name by becoming a great alchemist himself.
Mount & Blade: This trope is one of the possible backgrounds of your character. At least there's some recognition of your nobility with the ability to own your own banner right from the start and a slight boost to starting fame (which means more troops).
Paladins: Lian is the sole heiress of House Aico, a once-powerful family that has lost much of its power and she has taken it upon herself to restore her House to its former glory. Downplayed in that she is well off enough to avoid being reduced to wear rags and has armies to command.
Pokémon Black and White has Grimsley, an Elite Four member from the Unova region. Word of God says he's the son of an important family that lost everything, causing him to develop a gambling habit.
Acerola from Pokémon Sun and Moon is apparently the last living member of the Alolan royal family. She dresses in a ragged purple dress, seemingly by choice, and lives at the Aether House orphanage.
Rune Factory Oceans: Electra and Beatrix are part of the extremely wealthy De Sainte-Coquille family featured in every other game in the series. Despite their heritage and living in the biggest mansion on the island, Beatrix's eccentric tendencies have left her and Electra with so little to their name that Electra has to work part-time at every store in town in order to make ends meet and pay wages to the one maid who hasn't left them.
Shadow Gambit: The Cursed Crew: Pinkus was once wealthy and lived in high society. Some event in his past led to him becoming impoverished, and he wound up as an undead pirate on the Red Marley.
Shadow Hearts: Covenant: Karin descends from an ancient line of Bavarian nobility, but her family has fell on hard times, forcing her to join the German army.
Stellaris: Any upper Strata pop left unemployed long enough will drift to a lower one, angering them.
Suikoden V: Played for humor in the personage of one Egbert Aethelbald. Did you know that the AETHELBALD FAMILY was once the most PRESTIGIOUS in the LAND before those FILTHY GODWIN DEVILS CONSPIRED TO TAKE IT ALL AWAY? If you didn't, you will. He yells about it to anyone who will listen. He wears a battered uniform and lives in a sewer of all places. Furthermore, the fall of the family happened one hundred years ago; it isn't entirely clear if he is actually an Aethelbald or just believes he is. Oh yeah, when you first meet him, he's living in the sewers. Curiously, he actually is one of the more noble characters in the setting, at least in the spirt of the term. If you manage to track him down (which isn't easy, trust us), he'll join up with the Prince not because he hates the Godwins, but because he believes it's a cause worth fighting for. He makes no attempt to reclaim any of his family's lost wealth, and proves to be a good Calvary officer, as well as one of the more useful support characters in the game. In fact, after the war's over, he goes back to living in the sewers just for the sake of being eccentric.
Victoria: POPs whose needs are left unsatisfied can demote to a lower class.
Zeke in Xenoblade Chronicles 2. He's the prince of Tantal, but has a poor relationship with his father and has been living in exile for at least a decade. Part of this is done intentionally, as he never uses his background or heritage to get favors even in situations where he's starving or being mistreated.
Yes, Your Grace: King Eryk is a relatively early phase of this, but enough into it that acts of welfare towards the general population, maintenance of the army being prepared for a war, and any luxury purchased for the royal family comes out of the same fairly tight budget. One of the ways to lose the game is to get in an Unstable Equilibrium caused by the population paying fewer taxes because too many people were refused help, and Eryk not being able to help many people (if any at all) because the taxes don't bring in enough money to do so until a Torches and Pitchforks crowd shows up and kills Eryk if he can't promptly give its members a large quantity of both money and food.
