Twine publishes directly to HTML, so you can post your work nearly anywhere. Anything you create with it is completely free to use any way you like, including for commercial purposes.
Older 1.x version releases, which are macOS and Windows applications, are also available.
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A new tool has emerged that empowers just about anyone to create a game. It's called Twine. It's extremely easy to use, and it has already given rise to a lively and diverse development scene.
Carolyn Petit, Gamespot
Although plenty of independent games venture where mainstream games fear to tread, Twine represents something even more radical: the transformation of video games into something that is not only consumed by the masses but also created by them.
Laura Hudson, The New York Times Magazine
The simple beauty of Twine is this: if you can type words and occasionally put brackets around some of those words, you can make a Twine game.
If you're interested in making interactive fiction then there's no better place to start than Twine. It's possibly the simplest game making tool available, it will take you mere minutes to get started, and it has a wonderfully simple visual editor.
And aside from being free, it's really not programming at all — if you can write a story, you can make a Twine game.
Twine is the closest we've come to a blank page. It binds itself and it can bind itself along an infinite number of spines extending in any direction.
Twine is a registered trademark of the Interactive Fiction Technology Foundation. Hosting for this web site is also provided by the IFTF.