|See also:||challenge, ficathon, fic exchange, gift exchange|
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A challenge in which participants provide prompts (generally for fanfic) and then choose a prompt from a list compiled by the fest moderators. A fest may be fandom, pairing or character specific; it may have a particular theme, such as a holiday, a kink or a trope; it may be held to celebrate a particular event.
- Batsupes Secret Valentines Exchange focusing on producing fanworks for the Batsupes ship between Batman and Superman.
- Batsupes Tricks and Treats focusing on producing fanworks for Batman, Superman, and/or Batman/Superman.
- Bottom Clark 2021 focuses on producing fanworks where Clark Kent aka Superman bottoms.
- Krypton Survived Week focuses on producing fanworks about the survival of Krypton.
- LGBT Fest and Queer Fest focus on producing fanworks about the experiences of being lesbian, gay, bisexual, trans* or queer
- Merlin Frottage Fest was a 2011 kink fest held to produce frottage fics in Merlin fandom
- Yuletide is a very popular annual gift exchange for rare fandoms