PARIS—Ubisoft Entertainment SA said two more senior executives have left the company amid an internal investigation into allegations of misconduct and inappropriate behavior at the maker of “Assassin’s Creed” and other popular videogames.

The company said in a statement Sunday that Serge Hascoët, chief creative officer and a member of Ubisoft’s executive committee, and Yannis Mallat, the head of Ubisoft’s Canadian studios, have resigned.

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