A kind of authoring system designed for non-programmers.
It's composed of a visual editor, the QDK, for designing adventures and Quest, the player, for interpreting them. The QuestNet server allows to play multi-player games.
The source code of the games can also be edited with an ascii editor, for more experienced programmers. Although the code is interpreted and not compiled, it's possible to encrypt the game with the Quest Pro version.
The Quest system currently lacks some additional libraries for catching common verbs the player may type, giving this system an unfinished touch. This and the fact it was programmed in Visual Basic, and thus not portable to Unix platforms, decreased the interest of veteran interactive fiction authors.
Apart from that, Quest is a system with an easy and conveniant syntax, and it can handle many situations for coding games, making it good for beginners. It can also include multimedia contents.