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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 |
| King's Quest Collection | 2006 | Windows | Sierra Entertainment, Inc. | 3.00 |
| Leisure Suit Larry Collection | 2006 | Windows | Sierra Entertainment, Inc. | 2.25 |
| Space Quest Collection | 2006 | Windows | Sierra Entertainment, Inc. | 4.00 |
| Police Quest Collection | 2006 | Windows | Sierra Entertainment, Inc. | 4.00 |
| Leisure Suit Larry: Ultimate Pleasure Pack | 1999 | DOS, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.85 |
| Phantasmagoria Stagefright | 1999 | DOS, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.80 |
| Gabriel Knight Mysteries: Limited Edition | 1998 | DOS, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.93 |
| Space Quest: Collection Series | 1997 | DOS, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.66 |
| Leisure Suit Larry: Collection Series | 1997 | DOS, Windows | Sierra On-Line, Inc. | 3.75 |
| Shivers 2: Harvest of Souls | 1997 | Windows, Windows 3.x | Sierra On-Line, Inc. | 3.36 |
| King's Quest: Collection Series | 1997 | DOS, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.76 |
| Rama | 1996 | DOS, Macintosh, Windows | Sierra On-Line, Inc. | 3.38 |
| Phantasmagoria: A Puzzle of Flesh | 1996 | DOS, Windows | Sierra On-Line, Inc. | 3.61 |
| Lighthouse: The Dark Being | 1996 | DOS, Macintosh, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.70 |
| Leisure Suit Larry: Love for Sail! | 1996 | DOS, Macintosh, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.82 |
| Space Quest 6: Roger Wilco in the Spinal Frontier | 1995 | DOS, Macintosh, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.89 |
| Shivers | 1995 | Windows, Windows 3.x | Sierra On-Line, Inc. | 3.53 |
| Roberta Williams' Phantasmagoria | 1995 | DOS, Macintosh, Saturn, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.29 |
| Roberta Williams' Phantasmagoria (Deluxe Limited Edition) | 1995 | DOS, Windows | Sierra On-Line, Inc. | ... |
| Torin's Passage | 1995 | DOS, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.83 |
| The Beast Within: A Gabriel Knight Mystery | 1995 | DOS, Macintosh, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.95 |
| Police Quest: Collection Series | 1995 | DOS, Windows, Windows 3.x | Sierra On-Line, Inc. | 3.63 |
| Space Quest (Collector's Edition) | 1994 | DOS, Windows 3.x | Sierra On-Line, Inc. | 3.54 |
| King's Quest (Collector's Edition) | 1994 | DOS, Windows 3.x | Sierra On-Line, Inc. | 3.50 |
| Leisure Suit Larry's Greatest Hits and Misses! | 1994 | DOS, Windows 3.x | Sierra On-Line, Inc. | 3.87 | Selected Covers
Selected Screenshots
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