Ubisoft CEO Yves Guillemot previously called Vivendi's purchases "unsolicited and unwelcome," and he's been working on ways to fight the company's "creeping control" of his family's studio. In late May, Vivendi purchased a majority stake in Gameloft, the mobile games publisher also owned by the Guillemot family.

Vivendi has said it has no plans to take over Ubisoft, but its stock purchases continue to worry the studio's founders. Guillemot told CNBC last week that Ubisoft's main goal is to remain independent. However, as a backup plan, he's entertaining the idea of a merger with a gaming or tech company -- just not Vivendi.

For an informative breakdown of the Ubisoft-Vivendi saga, see Game Informer's June explainer.

Vivendi isn't a stranger to the video game world. It once owned a majority share of Overwatch and Call of Duty studio Activision Blizzard. Activision bought itself back from Vivendi in 2013 for $8.2 billion, transforming the studio into an independent company.