What is interactive fiction? A plain guide
Interactive fiction is any story where the reader's decisions change what happens next. That definition is simple and almost useless, because four very different things answer to the name.
If you have ever asked for an interactive fiction recommendation and been handed a 1980s puzzle game, a romance app, and a Twine story about grief in the same breath, this is why. The term is a family, not a genre. Sorting the family out is most of the work.
The four things people mean
Parser games. You type commands and the game understands a constrained language. Zork, Anchorhead, most of what wins the annual IFComp. The pleasure is puzzle-shaped: you are figuring out both the world and how to talk to it. The frustration is also puzzle-shaped, because guessing the verb the author had in mind is a skill in itself.
Choice-based fiction and gamebooks. You are shown options and you pick one. Fighting Fantasy books, Choice of Games, most Twine work. No parser, no guessing the verb, so the barrier is close to zero. What you get is a hand-authored tree: every path was written by a person, which means the writing can be excellent and the number of paths is finite.
Visual novels. Choice-based fiction with art, music, and usually voice. Doki Doki Literature Club, Ace Attorney, an enormous catalogue from Japan. Structurally close to gamebooks; culturally a separate world with its own conventions and audience.
AI text adventures. The newest branch. A language model writes the next passage in response to what you do, so nothing is pre-authored. AI Dungeon made the category visible; NovelAI, KoboldAI, SillyTavern and others built out the enthusiast end of it. The freedom is total and the coherence is the problem, which is the subject of the rest of this article.
The trade nobody can escape
Every form above is trading the same two things against each other: how free you are, and how well the story holds together.
A hand-authored branch always makes sense and always ends. A generated branch never ends and does not always make sense.
A gamebook can guarantee that chapter twelve honours chapter three, because a human wrote both and checked. It cannot let you do something the author did not anticipate. An AI text adventure inverts both halves: you can attempt anything, and nothing guarantees that what you did in chapter three is still true in chapter twelve.
Most people's disappointment with AI fiction is really a collision with this trade. The first hour is astonishing because freedom is the thing you notice first. The tenth hour is disappointing because coherence is the thing you notice last, and by then the story has quietly stopped being about anything.
How to tell if a system actually remembers
There is a simple test, and it takes about fifteen minutes.
- Establish something specific and checkable early. Tell a character a secret. Break an object. Make an enemy.
- Play ten to fifteen turns without referring to it at all. Go somewhere else, do something else.
- Come back and act as if it is still true. Ask the character about the secret. Look for the broken object. Meet the enemy again.
A system that is re-reading a transcript will usually go along with whatever you assert, because agreeing is cheaper than checking. A system with an actual record will either confirm it or contradict you for a reason. Both are good answers. Cheerful agreement with anything you say is the bad answer, and it is the most common one.
For a fuller version, with five tests and a score sheet, see how to tell whether an AI story really remembers.
Where to start, honestly
- If you want to know what the craft can do at its best, read a well-regarded choice-based work. The writing is authored, and the ceiling is high.
- If you like puzzles and do not mind an old-fashioned interface, the parser canon is deep and mostly free.
- If what you actually want is to be inside a world and see what happens, that is the AI branch, and it is worth going in knowing about the coherence trade rather than discovering it at chapter ten.
What we are building
Nostyss sits in the fourth category and treats the coherence problem as the whole point rather than a known limitation. Rather than asking a model to re-derive the world from the story so far, we keep a proper record of it: who knows what, who trusts whom, what has already happened.
You can read the technical version of that argument in our piece on why AI stories forget. Or you can just apply the fifteen-minute test above to us, which is the honest way to judge any of this.
Questions
What is interactive fiction in simple terms?
A story where the reader's decisions change what happens next. The term covers four different forms: parser games where you type commands, choice-based fiction and gamebooks, visual novels, and AI text adventures, where a language model writes each passage in response to what you do.
What is the difference between interactive fiction and a visual novel?
A visual novel is one kind of interactive fiction: choice-based, with art, music and often voice. Interactive fiction is the wider family, which also includes parser games, text-only gamebooks and AI text adventures.
Is AI interactive fiction any good?
It can be, and it trades differently from authored fiction: you can attempt anything, but nothing guarantees that what you did early is still true later. The honest way to judge one is to test its memory yourself, which takes an evening.
Where should a beginner start with interactive fiction?
It depends on what you want. For the best writing, a well-regarded choice-based work. For puzzles, the classic parser games, most of them free. To be inside a world and see what happens, an AI text adventure, knowing the coherence trade going in.
See whether it actually remembers
Ten worlds you can start without an account. Play a few chapters, contradict something you established earlier, and watch what the world does about it. That test is the honest way to judge any of this.
Choose a world