Game studios / Sierra On-Line Game studio Sierra On-Line 13 games in the catalogue ⏱ 1983–1999 3 platforms Games by the studio (13) Frogger · 1983 Conversion of the Konami/Sega classic; a frog crossing a road and a river full of turtles and crocodiles. A800 Ultima II: Revenge of the Enchantress · 1983 Expands the series with time and planet travel; an anachronistic tone alongside a serious story. A800 King's Quest II: Romancing the Throne · 1985 King Graham rescues Valanice in a new fairy-tale adventure through a magic portal. Win9x King's Quest III: To Heir Is Human · 1986 A slave secretly completes tasks under the watch of an evil wizard; one mistake means instant death. Win9x King's Quest IV: The Perils of Rosella · 1988 Princess Rosella takes the lead role for the first time; fairy-tale motifs and adventure puzzles. DOS Win9x King's Quest I: Quest for the Crown · 1990 The game that started Sierra's fairy-tale series; a remake with colorful VGA graphics. Win9x King's Quest V: Absence Makes the Heart Go Yonder! · 1990 The first entry of the famous series controlled by clicking instead of typing commands. DOS Space Quest IV: Roger Wilco and the Time Rippers · 1991 Space janitor Roger Wilco travels through time between installments of his own series. DOS King's Quest VI: Heir Today, Gone Tomorrow · 1992 Usually considered the series' peak; an archipelago of nations from angels to Pedants. DOS Gabriel Knight: Sins of the Fathers · 1993 It proved that an adventure game can also be serious and dark; the script was written by Jane Jensen. DOS Gabriel Knight: The Beast Within · 1995 The second entry in the series and proof that live-action footage in a game didn't have to be a cheap gimmick. Win9x Gabriel Knight 3: Blood of the Sacred, Blood of the Damned · 1999 The series' move into 3D, tied to legends about Rennes-le-Château and a hidden treasure. Win9x