 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 Microsofts 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. 