King's Quest IV: The Perils of Rosella

Written and designed by Roberta Williams, King's Quest IV: The Perils of Rosella is the fourth game in the King's Quest series. It was released in 1998 for PC. The Amiga and Atari ST versions were published in 1990.

It's the first game of the series with a female protagonist (Rosella), and it was also the first to use the new "SCI" engine created by Sierra-On-Line for their graphics adventures. The new engine made much better graphics possible compared to King's Quest III: To Heir is Human and all the older chapters. One significant difference was the screen resolution of 320x200 pixels instead of 160x200.

Another new feature was the day-and-night cycle, with some actions only possible at night and vice versa. William Goldstein, the composer of the musical Fame, created the music for the game.