A 'Voldemort raises Harry Potter' story with the twist of one Neville Longbottom.
Long summary:
Lord Voldemort, aware of the prophecy predicting his demise, captures the two fateful children in order to observe their development and get rid of the threat as soon as it reveals itself.
The two boys, Harry and Neville, are brought up as brothers under Voldemort's watchful eye. While Neville grows up to resent him and love his only family, Harry grows up in an unhealthy infatuation with the Dark Lord and jealousy of his brother.
After witnessing the traumatic death of Cedric Diggory at the hand of Lord Voldemort, Harry comes back to Hogwarts only to be accused of the murder. Things wrap up from miserable to outwrite terrible, as a the boundary between dream and reality blurs for Harry, and a connection is left free to fester unchecked.