(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 BloombergWhat Do US Vehicle Regulators Have Against Tiny Cars?Mexico City Restricts Airbnb Rentals to Curb ‘Gentrification’NYC Schools Reverse Course on Cell-Phone Ban After Parents BalkThe Corner Sto