The fourth in the epic King's Quest series of games by Sierra, this game was released in August of 1988.
This game is available on Good Old Games as part of the King's Quest 4-6 pack, and utilizes DOSBox to play on modern systems. In addition to the games, the buyer also gets the game manuals in PDF format, and avatars and wallpapers in JPG format.
The game has an in-built form of copy protection requiring the user to enter a keyword from the game manual. The game is uses text inputs.