Taco Fiction is the winner of 2011's Interactive Fiction Competition (previously). According to Emily Short, "Taco Fiction has been the most purely enjoyable experience of the comp so far, full of entertaining twists and surprises, fair puzzles, and a forgiving design that lets you go back for objects left behind or tasks not completed." [more inside]
posted by mokin on Dec 4, 2011 - 8 comments

Vicious Cycles is a text adventure converted into HTML, and the results are pretty great. [more inside]
posted by The Devil Tesla on May 27, 2011 - 22 comments

Choice of the Dragon is a web-based cyoa/adventure gamebook thingy by choiceofgames (blog, including links to their free ChoiceScript documentation/interpretor). Awesome.
posted by juv3nal on Feb 1, 2010 - 15 comments

Alabaster. Experimental interactive fiction take on Snow White written collectively by Emily Short and ten others. Features 18 endings and procedural illustrations that dynamically reflect game state. [more inside]
posted by juv3nal on Jun 5, 2009 - 8 comments