King's Quest: Mask of Eternity (also known as King's Quest VIII: Mask of Eternity) is a hybrid point-and-click adventure and action-adventure developed and published by Sierra Studios in 1998. It was the eighth official game in the King's Quest series, the first and only game in the main series where the main character is neither King Graham nor a member of his family, as well as the first in the series to use a full 3D engine as opposed to the 2D cartoon or pixel style of the earlier games and the first to omit the sequel numbering system on box artwork and title screen.