King's Quest IV

King's Quest IV is the fourth game in the King's Quest series and the first to use Sierra's Creative Interpreter engine, although a version using the AGI engine was also released. After King Graham suffers a heart attack, the royal family mourns as his death appears to be near. Luckily, a fairy named Genesta is willing to help Rosella in her quest to help her father and tells of a fruit that brings life to people. Not so luckily, Genesta is rapidly dying off, since her medallion was stolen by Lolette. It's up to Rosella to take this medallion back before Genesta dies and get the fruit before Graham dies.

Revision Differences
Several of the backgrounds were changed between the original release in 1988 and the subsequent re-release the following year. A lot of these backgrounds actually made the background objects (usually trees) less detailed so you focus more on the foreground, along with standardizing the art style.

The background fauna became nothing more than silhouettes. The flowers are more densely packed and there appears to be less of them.

The two shrubs in front of the pool have been removed from the 1989 version.

The shading on the roof is darker and a few trees were removed.

The trees became a little less detailed.

The skull cave got some more detail.

The house has its lights on in later versions.

There's some background shading as well. The rocks' shadows became less cartoony, but the front of the rocks is more like a cyan color.