Released in September 2008, the game quickly became the fastest-selling Star Wars game ever, and has since sold six million units worldwide as of October 2009.
The plot of the game tells the story of the 18 years between the two Star Wars trilogies.
During Starkiller's escape from Vader's research ship, he is referred to as 'Subject 1138' several times via the loudspeaker. This is a reference to George Lucas' first film, THX 1138 (1971).
The Secret Apprentice is referred to several times as "Starkiller" either as a name or a codename. This was originally to be Luke Skywalker's last name.
Although never mentioned in-game, Starkiller's true name is "Galen Marek" as showcased in the database section of the video game.