The Federal Trade Commission said on Thursday it has filed an antitrust case against Microsoft to challenge the software maker's attempt to acquire video game publisher Activision Blizzard, claiming it would violate U.S. law.In the statement, the FTC said Microsoft has a record, including with its 2021 ZeniMax deal, of buying games and using the moves to suppress competition from other companies that make consoles.Microsoft promised the European Commission antitrust officials that the company wouldn't have an incentive to stop people from playin ZeniMax games on consoles other than the Xbox, but after the European Commission permitted the deal to proceed, Microsoft announced that it was making ZeniMax games such as Elder Scrolls VI, Redfall and Starfield into exclusives, the FTC said in its suit.Microsoft could adjust prices or worsen the experience on competing hardware such as Sony PlayStation consoles, or keep Activision Blizzard consoles from reaching consoles other than Microsoft Xbox systems, the agency said.That requires COD being on diverse platforms after the merger of Microsoft + Activision Blizzard," Lulu Cheng Meservey, Activision's executive vice president for corporate affairs and communications chief, said in a tweet."