Activision also continues to generate revenue from Call of Duty: Black Ops III, which was released more than two years ago. The company still supports the game with add-on content, which has extended the life of the title. Selling add-on content is now the focus of the company and has made up the majority of its annual revenue over the past two years. In 2017, Activision generated more than $4 billion from add-on content, which represents growth of 10% over 2016. For perspective, this revenue category was less than $1 billion just three years ago.