AU, Harry Potter was four years old when The Dark Lord attacked, Harry vanquished the Dark Lord but his baby brother takes all the credit. Dark but not evil Harry! Super Powerful&Smart Ravenclaw Harry. Starts with Harry's fourth year. HP/FD
The Semiclassic 'everyone has been lying to Harry about everything' plot. Very AU. Bashing of pretty much everyone. Mind Control Sex. Language. Dumbledore decides the Old Families won't tolerate the Chosen One being with a mudblood. Sucks to be Ron Ginny
Hermione needs to go back home quickly at the start of 'Order of the Phoenix', and asks Tonks to take her place that day. Tonks tries to fool Harry that she is the real Hermione, and things quickly escalate from there...
Harry is hit by a misfired undoing spell in third year and starts to remember things causing him to flee together with Hermione and a few others, including a godfather he didn't know he had. For Wizarding Britain and Dumbledore in particular old oaths and secrets are now brought to light. Dumbledore bashing, AU.
As per the Hat's decision, Harry gets Sorted into Slytherin upon his arrival in Hogwarts—and suddenly, the future isn't what it used to be.
Harry Potter loves, and is loved by, his parents, his godfather, and his brother. He isn't mistreated, abused, or neglected. So why is he a Dark Wizard? NonBWL!Harry. Not your typical Harry's brother is the Boy Who Lived story.