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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 |
| Space Quest Collection | 2006 | Windows | Sierra Entertainment, Inc. | 4.00 |
| Police Quest Collection | 2006 | Windows | Sierra Entertainment, Inc. | 4.00 |
| King's Quest Collection | 2006 | Windows | Sierra Entertainment, Inc. | 3.33 |
| Leisure Suit Larry Collection | 2001 | Windows | Sierra Entertainment, Inc. | 2.25 |
| Phantasmagoria Stagefright | 1999 | DOS, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.80 |
| Leisure Suit Larry: Ultimate Pleasure Pack | 1999 | DOS, Windows, 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 |
| Leisure Suit Larry: Collection Series | 1997 | DOS, Windows | Sierra On-Line, Inc. | 3.73 |
| Shivers 2: Harvest of Souls | 1997 | Windows, Windows 3.x | Sierra On-Line, Inc. | 3.44 |
| King's Quest: Collection Series | 1997 | DOS, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.76 |
| Space Quest: Collection Series | 1997 | DOS, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.66 |
| Leisure Suit Larry: Love for Sail! | 1996 | DOS, Macintosh, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.75 |
| Phantasmagoria: A Puzzle of Flesh | 1996 | DOS, Windows | Sierra On-Line, Inc. | 3.65 |
| Rama | 1996 | DOS, Macintosh, Windows | Sierra On-Line, Inc. | 3.39 |
| Lighthouse: The Dark Being | 1996 | DOS, Macintosh, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.69 |
| The Beast Within: A Gabriel Knight Mystery | 1995 | DOS, Macintosh, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.97 |
| Roberta Williams' Phantasmagoria | 1995 | DOS, Macintosh, SEGA Saturn, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.35 |
| Roberta Williams' Phantasmagoria (Deluxe Limited Edition) | 1995 | DOS, Windows | Sierra On-Line, Inc. | ... |
| Torin's Passage | 1995 | DOS, Macintosh, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.83 |
| Space Quest 6: Roger Wilco in the Spinal Frontier | 1995 | DOS, Macintosh, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.87 |
| Shivers | 1995 | Macintosh, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.58 |
| Police Quest: Collection Series | 1995 | DOS, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.63 |
| Leisure Suit Larry's Greatest Hits and Misses! | 1994 | DOS, Windows 3.x | Sierra On-Line, Inc. | 3.84 |
| Roberta Williams' King's Quest VII: The Princeless Bride | 1994 | DOS, Macintosh, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.38 |
| King's Quest (Collector's Edition) | 1994 | DOS, Windows 3.x | Sierra On-Line, Inc. | 3.50 |
Selected Covers
 Front cover for Rama
Selected Screenshots
 Screenshot from Rama
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