"King's Quest IV" was the only native-mode SCI game to also have an AGI version (some games originally made with the AGI engine like the original "" were released in updated SCI versions). This was done mostly as a fall-back measure because the SCI engine was new and unproven, and also for the large existing user base of 8086 machines. However, only a quite small number of copies were sold. It was discontinued within a few months of the game's August 1988 release. The two games are identical in gameplay, except that the SCI version was updated with some additional parser responses. The AGI version 2.0 contains the "beam me" Easter egg, which transported Rosella to a "Star Trek"-esque room with all of the development team present (this Easter egg is not present in any SCI version). A version identical to the AGI version was released on the Apple IIGS with improved music and effects (over the MS-DOS AGI counterpart); the IIGS port does not use the SCI engine for performance reasons.