High Moon Studios (formerly Sammy Studios) is an American video game developer that used to be a part of Sierra Entertainment. After a period as independent studio, the developer was acquired by Vivendi Games in January 2006 and retained the current name. It is now owned by Activision Blizzard, a parent company of Activision. It has developed multiple Transformers video games as well as assisting in the development of both Call of Duty: Advanced Warfare and Destiny.