SpaceBattles and Sufficient Velocity are forums. They look like forums. They act like forums. You navigate them with thread pages and pagination. There is no algorithm, no recommendation engine, and no reading progress tracking.
They also host some of the best web fiction being written in English, and the culture that produces those stories is unlike anything on Royal Road, AO3, or Wattpad. If you've never read forum fiction before, here's how it works.
What these places are
SpaceBattles started in 1996 as a versus debate forum — "who would win in a fight between an Imperial Star Destroyer and the USS Enterprise?" It grew, fractured, and eventually spawned a creative writing section that became one of the most active web fiction communities online. The forum's culture is argumentative, detail-oriented, and deeply invested in logical consistency. Stories get audited by readers who will point out if your spaceship's power output doesn't match its stated capabilities.
Sufficient Velocity split from SpaceBattles in 2014 over moderation disputes. It's the same forum software, the same basic culture, and a slightly different moderation philosophy. Many authors cross-post between both, and most readers browse both. SV is generally considered more tightly moderated and more welcoming to certain types of content that SB's moderation culture is stricter about.
Both forums use XenForo software. Stories live in the "Creative Writing" or "User Fiction" sections, organized by threads rather than story pages. A "story" is a thread. The first post contains chapter one. Subsequent chapters appear as replies. Reader discussion happens between chapters, in the same thread.
How to read forum fiction
The thread-based format changes how you experience a story.
Reader discussion is part of the experience. Between chapters, you'll see reader reactions, speculation, arguments, and occasionally omakes (unofficial side stories written by readers). This can be annoying if you just want to read the next chapter, but it's also one of the format's strengths — the discussion becomes a shared experience that enriches the story.
Most stories have "Reader Mode" or threadmarks. Threadmarks are an author-side feature that lets readers navigate directly between chapters, skipping discussion. If a thread has threadmarks, you'll see forward/back arrows and an index. Some authors also maintain "Reader Mode" versions where the story is presented without discussion — these are usually linked in the first post. If you just want the story, use threadmarks.
Authors respond to readers mid-thread. This is unique to forum fiction. An author posts a chapter, readers discuss it, and the author pops into the discussion to answer questions, clarify points, or engage with reader theories. This direct author-reader relationship is part of why forum fiction communities are so sticky — the author isn't distant, they're in the thread with you.
The "Watched Threads" system is your tracker. When you watch a thread, you get alerts when it updates. These alerts appear in your forum notification bar. The system is basic but functional within the forum ecosystem — you'll know when a story you're following gets a new chapter.
What gets written here
Forum fiction has a distinct flavor that comes from the culture.
Rational fiction and "competence porn." SpaceBattles and SV readers value intelligent characters who use their abilities effectively. A story where the protagonist makes obvious tactical errors will get called out in the comments. This pushes authors toward tighter plotting and more internally consistent worldbuilding. The rational fiction movement — stories where characters act intelligently with the information available, and plot holes are intentionally patched — grew largely out of SB/SV culture.
Worm fanfiction. Wildbow's superhero web serial Worm has the largest fanfiction presence on SB/SV by a significant margin. The "Parahumans" setting is treated almost like a shared universe for fan authors. There are Worm fics that explore alternate powers, fix-it timelines, crossovers, and original characters within the setting. If you want to read Worm fanfiction, this is where the community lives.
Quests. A quest is a hybrid between fiction and game where the author presents a scenario and readers vote on what the protagonist does next. The author writes the outcome of the winning vote. Quests are interactive, community-driven, and unique to forum culture. They range from original settings to fanfiction to historical scenarios. Running a popular quest is a serious time commitment — authors update daily or near-daily and process dozens of reader votes.
Original fiction. Both forums have extensive original fiction sections. SB's original fiction tends toward sci-fi, alternate history, and rational fic. SV's original fiction sections skew more toward fantasy, queer fiction, and experimental formats. The quality varies widely, but the top-end work rivals anything on Royal Road.
How to find good stories
There is no algorithm and no ranking system. Discovery happens through:
The front page of Creative Writing / User Fiction. Threads with recent activity rise to the top, which means active stories and popular discussions stay visible. Checking the first few pages regularly gives you a pulse on what's currently active.
The recommendation threads. Both forums have dedicated recommendation threads where readers suggest stories based on specific criteria. Searching for a genre or trope you like within the recommendations subforum is more effective than browsing raw.
Word count and thread pages. A story thread with 50+ pages of discussion has an audience. A thread with 500+ pages is a phenomenon. The page count is a rough proxy for popularity, but it's biased toward long-running stories and doesn't distinguish between story chapters and reader discussion.
Following recommendations from authors you like. If an author you enjoy posts in another author's thread saying they're a fan, that's a strong signal. Author-to-author recommendations carry more weight than reader recommendations.
The tracking problem
Forum fiction has a tracking gap that other platforms fill with built-in tools. Watched Threads notify you of updates, but:
- You can't tell from the alert whether the update is a new chapter or someone reviving a discussion thread from three years ago
- There's no reading progress tracking — you have to remember what chapter you're on
- If you read across SB and SV (and most readers do), your tracking is split across two forums
- The system doesn't connect to any other platforms
Storywatch solves this by treating forum threads the same as any other story URL. Paste the thread link, and Storywatch tracks new threadmarked posts as chapters. Your SpaceBattles quest, your SV original fiction, and your AO3 fanfics all live in the same library.
SpaceBattles and Sufficient Velocity are weird places. They look like 2000s internet, and in many ways they are 2000s internet — the culture and norms have evolved continuously rather than being replaced by a redesign. That continuity is part of why they produce such good fiction. The community memory is long, the standards are high, and the direct author-reader feedback loop pushes writers to improve in ways that platform algorithms can't replicate.