(Bloomberg) -- Tencent Holdings Ltd. and Ubisoft Entertainment SA’s founding Guillemot family are considering options including a potential buyout of the French video game developer after it lost more than half its market value this year, according to people familiar with the matter. Most Read from BloombergSingapore Ends 181 Years of Horse Racing to Make Way for HomesFrom Cleveland to Chicago, NFL Teams Dream of Domed StadiumsWhat Do US Vehicle Regulators Have Against Tiny Cars?For a Master of