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Game Engine: Sierra's Creative Interpreter (SCI)Group DescriptionWhile Sierra's AGI had demonstrated surprising legs, having been initially conceived for the PCjr within a matter of a few years it found itself underequipped to take advantage of a hardware revolution of expanded graphics and sound capabilities. Jeff Stephenson was called upon to provide a game-making framework for the current and future markets, and he provided an object-oriented scripting language, initially entitled the LSCI, for Large-model Script Code Interpreter, soon re-styled Sierra's Creative Interpreter. It was in continuous development, with five major versions, from 1988 (the first SCI release King's Quest 4, also variantly released as Sierra's final AGI game) through to 1996.
 Game Title | Year | Platform | Publisher | MobyScore |
| The Beast Within: A Gabriel Knight Mystery | 1995 | DOS, Macintosh, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.96 |
| Castle of Dr. Brain | 1991 | Amiga, DOS, Macintosh | Sierra On-Line, Inc. | 3.98 |
| Codename: ICEMAN | 1989 | Amiga, Atari ST, DOS | Sierra On-Line, Inc. | 3.31 |
| The Colonel's Bequest | 1989 | Amiga, Atari ST, DOS | Sierra On-Line, Inc. | 3.71 |
| Conquests of Camelot: The Search for the Grail | 1990 | Amiga, Atari ST, DOS | Sierra On-Line, Inc. | 3.65 |
| Conquests of the Longbow: The Legend of Robin Hood | 1991 | Amiga, DOS | Sierra On-Line, Inc. | 3.85 |
| The Dagger of Amon Ra | 1992 | DOS, Windows 3.x | Sierra On-Line, Inc. | 3.81 |
| Daryl F. Gates' Police Quest: Open Season | 1993 | DOS, Macintosh, Windows 3.x | Sierra On-Line, Inc. | 3.17 |
| EcoQuest 2: Lost Secret of the Rainforest | 1993 | DOS, Windows 3.x | Sierra On-Line, Inc. | 3.90 |
| EcoQuest: The Search for Cetus | 1991 | DOS | Sierra On-Line, Inc. | 3.88 |
| Freddy Pharkas: Frontier Pharmacist | 1993 | DOS, Macintosh, Windows 3.x | Sierra On-Line, Inc. | 3.85 |
| Gabriel Knight Mysteries: Limited Edition | 1998 | DOS, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.93 |
| Gabriel Knight: Sins of the Fathers | 1993 | DOS, Macintosh, Windows 3.x | Sierra On-Line, Inc. | 4.04 |
| Hero's Quest: So You Want To Be A Hero | 1989 | Amiga, Atari ST, DOS | Sierra On-Line, Inc. | 3.84 |
| Hoyle Classic Card Games | 1993 | DOS, Windows 3.x | Sierra On-Line, Inc. | ... |
| Hoyle Official Book of Games: Volume 1 | 1989 | Amiga, Atari ST, DOS, Macintosh | Sierra On-Line, Inc. | 3.51 |
| Hoyle Official Book of Games: Volume 2 | 1990 | Amiga, Atari ST, DOS, Macintosh | Sierra On-Line, Inc. | 3.62 |
| Hoyle Official Book of Games: Volume 3 | 1991 | Amiga, DOS | Sierra On-Line, Inc. | 3.64 |
| The Island of Dr. Brain | 1992 | DOS | Sierra On-Line, Inc. | 3.94 |
| Jones in the Fast Lane | 1991 | DOS | Sierra On-Line, Inc. | 3.90 |
| Jones in the Fast Lane (Enhanced CDROM version) | 1992 | DOS, Windows 3.x | Sierra On-Line, Inc. | 3.45 |
| King's Quest Collection | 2006 | Windows | Sierra Entertainment, Inc. | 3.33 |
| King's Quest: Collection Series | 1997 | DOS, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.76 |
| King's Quest (Collector's Edition) | 1994 | DOS, Windows 3.x | Sierra On-Line, Inc. | 3.50 |
| King's Quest IV: The Perils of Rosella | 1988 | Amiga, Apple II, Apple IIgs, Atari ST, DOS | Sierra On-Line, Inc. | 3.81 | Selected Covers
Selected Screenshots
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