Interactive fiction, often abbreviated IF, is software simulating environments in which players use text commands to control characters and influence the environment. Works in this form can be understood as literary narratives, either in the form of interactive narratives or interactive narrations. These works can also be understood as a form of video game, either in the form of an adventure game or role-playing game. In common usage, the term refers to text adventures, a type of adventure game where the entire interface can be "text-only", however, graphical text adventures still fall under the text adventure category if the main way to interact with the game is by typing text. Some users of the term distinguish between interactive fiction, known as "Puzzle-free", that focuses on narrative, and "text adventures" that focus on puzzles.
The Interactive Fiction Competition is one of several annual competitions for works of interactive fiction. It has been held since 1995. It is intended for fairly short games, as judges are only allowed to spend two hours playing a game before deciding how many points to award it. The competition has been described as the "Super Bowl" of interactive fiction.
The Z-machine is a virtual machine that was developed by Joel Berez and Marc Blank in 1979 and used by Infocom for its text adventure games. Infocom compiled game code to files containing Z-machine instructions and could therefore port its text adventures to a new platform simply by writing a Z-machine implementation for that platform. With the large number of incompatible home computer systems in use at the time, this was an important advantage over using native code or developing a compiler for each system.
Icehouse pieces, or Icehouse Pyramids, Treehouse pieces, Treehouse Pyramids and officially Looney Pyramids, are nestable and stackable pyramid-shaped gaming pieces and a game system. The game system was invented by Andrew Looney and John Cooper in 1987, originally for use in the game of Icehouse.
Andrew J. Looney, better known as Andy, is a game designer and computer programmer. He is also a photographer, a cartoonist, a video-blogger, and a marijuana-legalization advocate.
Inform is a programming language and design system for interactive fiction originally created in 1993 by Graham Nelson. Inform can generate programs designed for the Z-code or Glulx virtual machines. Versions 1 through 5 were released between 1993 and 1996. Around 1996, Nelson rewrote Inform from first principles to create version 6 . Over the following decade, version 6 became reasonably stable and a popular language for writing interactive fiction. In 2006, Nelson released Inform 7, a completely new language based on principles of natural language and a new set of tools based around a book-publishing metaphor.
Text Adventure Development System (TADS) is a prototype-based domain-specific programming language and set of standard libraries for creating interactive fiction (IF) games.
Graham A. Nelson is a British mathematician, poet, and the creator of the Inform design system for creating interactive fiction (IF) games. He has authored several IF games, including Curses (1993) and Jigsaw (1995).
Glulx is a 32-bit portable virtual machine intended for writing and playing interactive fiction. It was designed by Andrew Plotkin to relieve some of the restrictions in the venerable Z-machine format. For example, the Z-machine provides native support for 16-bit integers, while Glulx natively supports 32-bit integers.
Glk is a portable application programming interface (API) created by Andrew Plotkin for use by programs with a text interface; these programs mostly include interactive fiction (IF) interpreters for Z-machine, TADS, Glulx, and Hugo games, and IF games written in more obscure file formats such as those used by Level 9 Computing and Magnetic Scrolls.
Blorb is a package format for interactive fiction games. Many such games incorporate resources such as sound effects, music, or pictures. Blorb's purpose is to bind these together into one file. The format was devised by Andrew Plotkin and is used in both the Z-machine and Glulx virtual machines, as well as by the Glk library.
Spider and Web is a piece of interactive fiction written by Andrew Plotkin.
The Dreamhold is an interactive fiction game by Andrew Plotkin released in 2004. Its primary purpose is to be a tutorial to IF, and because of that the "core" of the game is relatively easy to finish.
The Space Under the Window is a 1997 interactive fiction game by Andrew Plotkin. The game is part of a collaborative art piece, also entitled "The Space Under the Window", by Kristin Looney – each piece had to have this title, but was otherwise unconstrained.
Jon Ingold is a British author of interactive fiction and co-founder of inkle, where he co-directed 80 Days. His interactive fiction has frequently been nominated for XYZZY Awards and has won on multiple occasions, including Best Game, Best Story and Best Setting awards for All Roads in 2001. Ingold's works are notable for their attention to the levels of knowledge that the player and player character have of the in-game situation, with the effect often depending on a player who understands more than the character or vice versa. Ingold has also written a number of plays, short stories and novels.
Hunter, in Darkness is a 1999 interactive fiction game by Andrew Plotkin, written in Inform. It won the "Best Individual Puzzle" and "Best Setting" categories in the 1999 XYZZY Awards, and came in eighth overall in the 1999 Interactive Fiction Competition.
Shade is a psychological horror interactive fiction game written and published by Andrew Plotkin in 2000.
Earth and Sky is an interactive fiction trilogy written and produced by American author Paul O'Brian about the adventures of a brother and sister who gain superpowers while searching for their lost parents. Games in the series have won awards in the annual Interactive Fiction Competition and received an XYZZY Award.
A Change in the Weather is an interactive fiction (IF) video game.
