Here's something you might not have known about the Crusades: Angry guards during this period would never notice their quarry -- no matter how conspicuously he dressed -- if that quarry simply rode past them slowly on a horse. Also, one reason the Crusades lasted so long is that large groups of soldiers would only engage a single enemy 1-on-1, no matter how superior their numbers were. And, even more surprising, that same outnumbered foe could always easily elude his pursuers by hiding in a hay bale for around 10 seconds. Yes, it's indubitable: Assassin's Creed creates a medieval world so authentic that Richard the Lionheart himself wouldn't know the difference.

Source: 1UP