I really like 'A New Path for Harry'. In this fanfic, Harry's abuse has made him more withdrawn, but when sorted into Slytherin, he finds a new family of sorts. The story focuses on his interactions with other Slytherins who initially have their doubts about him but come to respect him. It's an interesting take on how Harry could have thrived in a different house environment.
One great fanfiction in this vein is 'The Slytherin Heir' where Harry, having endured abuse, is sorted into Slytherin. It delves into his complex relationships with his housemates and how he overcomes the stigma associated with Slytherin. The story shows his growth and development as he uses his Slytherin cunning to face the challenges in the wizarding world.
There's a fanfic titled 'Harry in Slytherin: Overcoming Abuse'. In it, Harry's sorting into Slytherin is a shock to many. But within Slytherin, he finds a sense of belonging. The house's values of ambition and self - preservation help him deal with his abuse. The story shows how he transforms his pain into strength with the support of his Slytherin peers. It's a story of redemption and growth.
One common theme is redemption. Harry, having been abused, often finds a way to redeem himself or be redeemed in the eyes of others through his actions in Slytherin. Another theme is identity. He has to grapple with his new identity as a Slytherin, which is different from the typical Gryffindor image of him.
It makes him more cynical. Harry, after experiencing abuse, is less trusting when sorted into Slytherin. He uses the house's cunning to protect himself from further harm.
I'm not sure of a specific title, but generally in such fanfics, the abuse Harry faces in Slytherin could be psychological, like being ostracized or bullied verbally. Some might explore how he tries to keep his Gryffindor values while dealing with this difficult situation in a house known for its more cunning nature.
I really liked 'Harry in Slytherin: A New Path'. It explores how Harry's values and actions might be different if he were in Slytherin. He has to deal with the Slytherin house's reputation and the prejudices that come with it. The author does a great job of showing how he might use his intelligence and cunning in a more Slytherin - like way.
Another plot could involve Harry discovering some long - lost Slytherin secrets. Maybe there are hidden chambers or spells that only Slytherin students are supposed to know about. Harry, being the curious and brave character he is, delves into these secrets. This could put him in a dangerous position as some Slytherins might not want him to expose or use these secrets, but it also gives him a chance to prove himself to his new housemates.
At first, Harry might be confused and a bit out of place. He's used to the Gryffindor way of thinking. But in Slytherin, he has to adapt. He becomes more cunning in a positive sense. He learns to think on his feet and use his wits in different ways than he did in Gryffindor. For example, instead of charging into a situation like he might have in Gryffindor, he starts to plan more carefully.
One interesting fanfiction could be 'The Slytherin Prince Harry'. In this story, Harry's sorting into Slytherin changes his whole Hogwarts experience. He has to deal with the prejudice from the Gryffindors while also trying to find his place among the Slytherins. It shows a different side of Harry, more cunning and politically aware.
Well, he might face a lot of challenges. In Slytherin, he'd be surrounded by students with different values compared to Gryffindor. He could have a tough time making true friends at first. But it might also give him a chance to change the perception of Slytherin from within. He could use his Gryffindor courage to influence the more cunning and ambitious Slytherins towards a more positive path.
Often, the story starts with Harry being sorted into Slytherin, which is a shock to everyone. Then the abuse begins, it could be from older Slytherin students or even some of the professors who have biases. As the story progresses, Harry has to learn to use his wits, which is a Slytherin trait, to fight back against the abuse. He might also have to deal with his own internal struggle of feeling like he doesn't belong in this house but still trying to make the best of it.