A video seemingly revealing a new Assassin's Creed Unity challenge mode called Rifts has been posted online.
It shows off a time-based platforming mode in which you collect glyphs for points in competition with the ghosts of other players.
The footage below was reportedly taken from an Xbox One development build of the game.
It has been suggested that the mode will feature playable versions of characters from previous series entries, with challenge maps set in different historical periods.
The Assassin's Creed Unity release date is October 28 on Xbox One, PS4 and PC.