A foremost ''King's Quest game originally used a language named Game Assembly Language, or *.gal, by its designer, Arthur Abraham. Once its independent designer left, Sierra was unable to complete a game, which experienced been designed to showcase a technology of the IBM PCjr. IBM "donated" its product, AGI, to Sierra to allow development of King's Quest'' to continue.

Once it debuted in the mid-1980s, AGI was innovative and manufactured telling utilise of a technology available at the instance. Late versions were adapted to utilize Sixteen colour EGA graphics and a Adlib soundcard.

Per prevent of the 80s, but, AGI's 160×200 resolution began to show its age and may not compete sustaining recently engines like Lucasfilm Games' SCUMM, which featured mouse support. Within 1990, Sierra abandoned AGI and began using the SCI (Sierra Creative Interpreter) engine for their adventure games.

A AGI technique was originally designed for the IBM PCjr and clones. In the 80s it was likewise ported to more platforms, & a select few games were freed commercially on the Apple II, Apple Macintosh, Amiga and Atari ST. Although there is a Sega Master System version of King's Quest and the NES version of King's Quest V, it's highly improbable that it utilise a AGI software program.

Sarien (Sierra TheGI Resource Wenterpreter Engine) occurs as personal, open-source re-implementation of Sierra's AGI.

List of AGI games
This occurs as listings of Sierra games mass produced within AGI (about chronological choose). Note that there use at times been fan corporations & more people world health organization use at times prodced commonly shareware or even 'unofficial'AGI games.

''King's Quest: Quest for the Crown (1984) King's Quest Two: Romancing a Potty (1985) The Black Cauldron (1986) Donald Duck's Playground (1986) King's Quest III: To Heir is Man (1986) Space Quest: The Sarien Encounter (1986) Leisure Suit Larry in the Land of the Lounge Lizards (1987) Mixed Up Mother Goose (1987) Police Quest: In Pursuit of the Demise Angel (1987) Gold Rush! (1988) Manhunter: New York (1988) Space Quest II: Vohaul's Retaliation (1988) King's Quest IV: A Perils of Rosella (1988) * Manhunter Two: San Francisco (1989) * King's Quest IV'' was at a same time produced & published inside two the AGI & SCI formats. the independent benefits of SCI come the higher guide (320x200 like than 160x200 within AGI), healthy card trend lines, mouse trend lines, & a extra versatile scripting body. Sierrthe supposed that contemporary online-prevent systems would become unable to rerun a SCI version, so requiring a 'lightly' version of the game. But, sales numbers proved a two wrong, & the AGI version was quickly discontinued. Because of its rarity, the AGI version can be considered a collector's item.

Since AGI was reverse engineered years ago, there are several freeware software online which allows that you to produce your systems have AGI games. As a matter of fact, a good total of population keep around processed their have AGI games.