Game:

King's Quest IV (1988)

Duration: 8:11

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Sound: Tandy

This game was simultaneously produced and published in the AGI and SCI engines. The AGI engine was used in all earlier Sierra adventure games, the SCI in all later ones. The main advantages of SCI are a higher video resolution (320x200 rather than 160x200 in AGI), sound card support, mouse support, and a more versatile scripting system.

The AGI version was made because Sierra supposed that contemporary low-end systems would be unable to run the SCI version and would require a 'lighter' version of the game. However, sales figures proved them wrong and the AGI version was swiftly discontinued. Because of its rarity, the AGI version could be considered a collector's item.

The two games are identical in gameplay, except that the SCI version was updated with some additional parser responses. However, AGI version 2.0 contains the famous 'beam me' easter egg (which transported Rosella to a Star Trek-esque room with all of the development team present). This easter egg is neither present in any SCI version nor in AGI version 2.3.

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