Fanfic The 100 Novels & Stories

Finding that sweet spot for 'The 100' crossovers is a quest I've been on forever. My top recommendation would be Archive of Our Own (AO3) without a doubt. The tagging system there is a godsend, letting you filter for crossover fusions with other post-apocalyptic series like 'The Walking Dead' or scifi shows like 'The Expanse' and 'Battlestar Galactica'. You can sort by kudos or comments to surface the real community favorites. I've found some absolutely brutal and brilliant Clarke/Bellamy dynamics transposed into the 'Fallout' game universe there.

Don't sleep on FanFiction.net either, even though the search is clunkier. Its sheer volume from the earlier fandom days means there are older, completed epics that never fully migrated. I stumbled on a massive, finished '100'/'Hunger Games' saga there that explored the politics of Panem in a way that felt totally fresh. The key is patience and using specific character names plus 'crossover' in the search bar.

I’m gonna say Bellamy and Clarke, obviously. But I don’t even ship them romantically anymore; the tension for me is all in the moral arguments and the way they kept orbiting each other’s decisions. That scene where he lists the people he’s lost because of her choices? That hurt more than any kiss could. Their entire dynamic is built on this horrible, necessary weight of leadership, and the fic that really digs into that aftermath—the silence after a war, the things they can’t take back—that’s where you find the real gut punches.

Honorable mention to Clarke and Lexa, though. Theirs is a different flavor, more tragic and poetic, cut short before it could really breathe. The best fics for them often explore the 'what if' of a peacetime, the quiet moments they never got, and that creates its own deep, aching kind of tension. It’s less about arguing and more about mourning a future.

One trope I haven't seen mentioned yet that's huge in 'The 100' post-apoc fics is the 'found family becomes a new clan' dynamic. It's not just about survival; it's about building something from the wreckage with the exact people the old world would have deemed unworthy. You'll see fics exploring what a society built by Clarke, Bellamy, Octavia, and the others would actually look like—its laws, its rituals, its inevitable new conflicts. It takes the Grounder culture premise and asks what a 'Wonkru' led by the delinquents would have become without all the external war.

Another interesting angle is the tech regression mixed with rediscovery. Stories where characters lose access to the last bits of Mount Weather or Becca's lab tech and have to truly start from scratch, but then discover old world caches that pose ethical dilemmas. Is it a blessing or a new curse? That tension between embracing a simpler, harsher life and clinging to the comforts of the past is everywhere in the fandom, especially in Bellarke or Clexa-centric stories where their leadership philosophies clash over that very issue.