Space Quest IV was one of may graphic adventure games released by Sierra and the fourth in the Space Quest series. Space Quest was one of the first games to use motion capture and cost over $1,000,000 to develop which was a massive amount for the time (1991). Point and Click adventures seem to be somewhat of a lost art but if you are looking for a good example of the genre then you could do worse that Space Quest IV.
Space Quest IV was originally released for DOS, Windows, Macintosh and Amiga in 1991. An Atari ST version was planned but later cancelled. An enhanced CD-ROM version was released the following year and has been re-released as part of various compilations throughout the years.