Based on the challenge Changing the Past by shigeki11: Severus and Harry have survived the final battle, however on the very night as Hogwarts sleep a Dark Lord from the past resurfaces and Hogwarts is destroyed. They journey to the past and adopt the toddler Tom Riddle in order to save the future. How much can they really change when some things seem destined to happen. Set partially during World War II where conditions of war exist; implied rape, implied torture though not of main characters (nothing graphic). Bad Dumbledore. Implied Dumbledore/Grindelwald.

Takes Place: 0 - Before Harry is born, 8 - Post Hogwarts (young adult Harry) - Snape flavour: None
Tags: Adoption, Child fic, Deaging, Slytherin!Harry, Time Travel
Categories: Snape Equal Status to Harry > Comrades Snape and Harry

The Golden Trio tries to prove that Snape really is a vampire one day. However, they learn a secret about Snape that sends Harry and Snape's dislike for each other into a talespin through a series of events.

Takes Place: 1st Year - Snape flavour: None
Tags: Alternate Universe, Time Travel, Vampires
Categories: Parental Snape > Guardian Snape

The Battle of Hogwarts has finally finished, but at a great cost. Harry no longer has anything to live for, and has come to two conclusions: either he commits suicide, or he changes the past, in order to be reunited with his loved ones. Deciding to choose the latter, he sets about his quest to vanquish evil for once and for all – by returning to that fateful night where it all began. True to his luck, he arrives too late. Follow Harry’s quest to change the past for the better.

Takes Place: 8 - Post Hogwarts (young adult Harry) - Snape flavour: None
Tags: Adoption, Alternate Universe, Child fic, Time Travel
Categories: Snape Equal Status to Harry > Comrades Snape and Harry

Harry Potter has lost his memories...and gained those of a different Harry. One that knows too much. And it scares Severus Snape. …so who is Rowling?

Takes Place: 6th summer - Snape flavour: None
Tags: Alternate Universe, Time Travel
Categories: Parental Snape > Guardian Snape, Teacher Snape > Trusted Mentor Snape, Teacher Snape > Professor Snape

At the welcoming feast Poppy notices that eleven-year-old Harry is wearing glamours, Severus looks after Harry during the first year, and together they decide to go on a time travel – will they be able to change something? AU, partly OOC.

Takes Place: 0 - Pre Hogwarts (before Harry is 11), 1st Year - Snape flavour: None
Tags: Alternate Universe, Resorting, Slytherin!Harry, Time Travel
Categories: Teacher Snape > Trusted Mentor Snape