AGI (Adventure Game Interpreter) was the game engine used by
create some of their earlier games. In the early 80's Sierra was given
AGI by IBM to show new features of the IBM PCjr, but it was later
Apple IIgs, Amiga, Atari ST, Macintosh, IBM PC and Tandy.
With the release of the first AGI game (King's Quest), Sierra
a new concept of 3D graphical adventure game, where the player could
move a character around the screen, behind, in front and over objects.
For the other commands a typing interface was used, similar to the
The graphics were based on a resolution of 160x200 and 16 colours,
AGI used the internal speaker for sound on the PC, but on the other
systems it was capable of doing three voices.
AGI was replaced by SCI in 1989.
These games used AGI: