У вашего броузера проблема в совместимости с HTML5
here link: http://www.mediafire.com/download/a4775cyoab5qw6e/100%25%2BSync.rar
and DLC:
https://thepiratebay.org/torrent/7861345/Assassin_s.Creed.III-DELUXE.DLC.PACK
first install DLC and files in savegame from mediafare copy to appdata romaining and theta and orbit and 103 and copy!!!!
in 100 % folder you have uplay theta and reloaded choose theta GOOD LUCK