Space Quest IV: Roger Wilco and the Time Rippers is a humorous graphic adventure created by Sierra On-Line and the fourth chapter of the Space Quest series started with Space Quest I: Roger Wilco in the Sarien Encounter.
It was released initially in 1991 for PC and Macintosh, then ported to Amiga and PC CD-ROM in 1992. It featured 256-color hand-painted graphics and motion capture animation. The game is entirely mouse-driven and it's using Sierra's icon-based SCI interface.