Space Quest IV
| Space Quest IV: Roger Wilco and the Time Rippers | |
|---|---|
| Cover art by Terry Robinson | |
| Developer(s) | Sierra On-Line | 
| Publisher(s) | Sierra On-Line | 
| Director(s) | Bill Davis (creative) | 
| Designer(s) | Scott Murphy Mark Crowe | 
| Programmer(s) | Scott Murphy Doug Oldfield | 
| Artist(s) | Mark Crowe | 
| Composer(s) | Mark Seibert Ken Allen | 
| Series | Space Quest | 
| Engine | SCI | 
| Platform(s) | DOS, Windows, Macintosh, Amiga, NEC PC-9801 | 
| Release | March 1991 | 
| Genre(s) | Adventure | 
| Mode(s) | Single-player | 
Space Quest IV: Roger Wilco and the Time Rippers is a 1991 graphic adventure game by Sierra On-Line, and the fourth entry in the Space Quest series. The game was released originally on floppy disks in March 1991, and later released on CD-ROM in December 1992 with full speech support; an Atari ST version was announced via Sierra Online's magazine, Sierra News Magazine, but was later canceled. The game sees players assume the role of Roger Wilco, who is thrust into a new adventure across time and space where he must thwart the plans of an old foe that is seeking revenge against him.
The game was developed with 256-color hand painted graphics, motion capture animation, and a switch from the text parser system to a more traditional point-and-click interface. The overall cost of the game was far greater than previous titles, but proved a commercial success, receiving positive reviews from critics for its humour, voice cast, and presentation. A sequel, Space Quest V, was released in 1993.