Space Quest is a very famous adventure-series made by Sierra. Instead of a stallward hero you have to deal with space-janitor Roger Wilco to master the adventures. The first installment, "The Sarien Encounter", starts off right as the spaceship Roger is on duty on is being raided and the important star generator is stolen by the evil Sariens.
There are two different versions of the EGA-variant, though. Du to trademark reasons the version 2.0 had to be edited slightly.