Is there any connection between the two developer studios: 'Sierra Online' and 'Valve Studios'?

  • 1
    What made you ask this question? Why do you want to know? Did you look into it?
    – Joachim
    Sep 5, 2022 at 18:58
  • I looked for 15 years and still no clear answer. An old 1987 video game published by Sierra made me want to know this, because I have heard it later turned into Valve
    – ivan866
    Sep 5, 2022 at 19:02
  • Where did you look then?!! I remember very fondly the logos of both Sierra and Valve from the Half-Life demo (I think Sierra Online had a popup during installation or so), and the full thing and its expansions after that. Good times!
    – Joachim
    Sep 5, 2022 at 19:05
  • @Joachim the correct answer is that 'Sierra 'is not a developer, then, but a publisher
    – ivan866
    Sep 5, 2022 at 19:15

1 Answer 1


Valve developed the game Half-Life, which was published in 1998 by Sierra On-Line. In 2002, Sierra On-Line officially changed their named to Sierra Entertainment, Inc. After Sierra was acquired by Vivendi Universal Games, and later Activision Blizzard, Valve was involved in legal disputes with Sierra's parent companies:

  • let me question more: Is 'Sierra Entertainment' related to 'Sierra On-line'?
    – ivan866
    Sep 5, 2022 at 18:28
  • 6
    That is literally in the opening statement of the Sierra Entertainment wikipedia article: "Sierra Entertainment, Inc. (formerly On-Line Systems and Sierra On-Line, Inc.)"
    – MiG
    Sep 5, 2022 at 18:31

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