Space Quest IV is a graphic adventure by Sierra On-Line, first released in 1991, and is the fourth in a series of six Space Quest games.
This is my second Sierra adventure (the first being Quest for Glory IV, which I haven’t written about yet because I only realised after finishing it that it was published in 1993 and not 1989 like I first though) and I found this one to be more accessible and the puzzles to be a more straightforward. Unfortunately, it suffered from the same narrative problems as Quest for Glory.