The Addventurers
Entertainment, Games, Video Games, Adventure, Browser Based - The Addventurers. Interactive, extendable, choose your own adventure stories.
http://www.addventure.com
QML
QML, the Quest Markup Language, is a free XML-based Choose-Your-Own-Adventure game system. Adventures can have images, sound, states to check, random events and much more.
http://questml.com/
iFiction - Main Lobby
Entertainment, Games, Video Games, Adventure, Browser Based - IFiction. The site itself is laid out like an adventure game.
https://www.ifiction.org/
GraalOnline - Home
GraalOnline: The Adventure - Massively Multiplayer Games
https://www.graalonline.com/
Daelindor - dark castle online game
Entertainment, Games, Video Games, Adventure, Browser Based - Daelindor - The Dark Castle. Walk through a dungeon beneath an old castle in search of a fabulous treasure.
http://www.daelindor.com/
Castle Arcana: The Castle Approach
Entertainment, Games, Video Games, Adventure, Browser Based - Castle Arcana Gothic Mansion. Take a stroll through the gardens, get lost in the Hedge Maze, explore hundreds of strange rooms, but don't drown in the pond.
http://www.castlearcana.com
Our Story, the Interactive Fiction Home
An interactive fiction site for all genres. Write a story, add on to a story, or discuss fiction and writing in general. Also a writer's resource, and home of the Our Stories Interactive Fiction Web Ring and the OurStory_Forum e-discussion group.
http://ourstory.freeservers.com/