Archive of Our Own

Ao3's home of the Sintember writing challenge, an annual (hopefully!) writing challenge that takes place over the month of September. As you might suspect from the name, this challenge focuses on sin. This challenge is a place to write and share your darkest fantasies. Each year will have its own sub-collection for entries into the challenge. This challenge is mainly hosted on tumblr (go to sintember.tumblr.com for more information), so if you are only submitting to the challenge from Ao3 please include a note as to whether you want your submission posted on the blog!

- If it's allowed on Ao3, it's allowed in this challenge.
- If you are adding a fic to this challenge, make sure to put somewhere what day/prompt the submission is for either in the summary or the notes.
- Please only submit your own fics to this challenge.
- You can write both fan content and original content. Characters/themes of all identities and various diversities are welcome!
- Submissions should have at least a little spice to them, either in tone, topic, or being generally taboo in nature, but they do not all have to be ‘extreme’ or even sexual.
- Submissions must be appropriately tagged, according to Ao3's tagging guidelines.
- There is no word limit or word requirement (though, one word stories might be pushing it a little). There are also no limits on style of prose, you could write a poem every day if you wanted to!
- You are allowed to submit fics you have already written in the past if you want to and they fit the prompt in some way. The only limit to this is that each story should only be submitted once.
- The prompts, and the blurbs that go with them, are meant to encourage creativity, not limit it. So long as you can link the story to the prompt in your mind, even if it is the flimsiest connection ever, you’re still following the prompt. That being said, if you don’t like a day’s prompt, feel free to just make up something you like better, or feel free to skip the day entirely.
- The cut-off date for each year's submissions will be July 1st the following year in order to focus and plan for the next year.