The Federal Trade Commission (FTC) has filed a lawsuit to block Microsoft Corp from buying leading video game developer Activision Blizzard Inc (NASDAQ:ATVI), alleging that the $69 billion deal suppresses competition in the gaming industry. In a complaint issued today, the FTC pointed to Microsoft's record of acquiring and using valuable gaming content to suppress competition from rival consoles, including its acquisition of ZeniMax, the parent company of well-known game developer Bethesda Softworks.