Space Quest 4 Full List of Cheat Codes for PC 

Space Quest IV: Roger Wilco and the Time Rippers is a 1991 graphic adventure game by Sierra On-Line. It was released on floppy disks on March 4, 1991, and released on CD-ROM in December 1992 with full speech support and featuring Laugh-In announcer Gary Owens as the voice of the narrator. It featured 256-color hand painted graphics and a fully mouse-driven interface. It was one of the first games to use motion capture animation. The game cost over US$1,000,000 to produce and sold more than its three predecessors combined. An Atari ST version was announced via Sierra Online's magazine, Sierra News Magazine, but was later canceled.