So I've completed all the single player achievements and  unlocked the 2 Project Legacy capes (finally).  I'm still missing the next to last cape in the inventory menu (the one right above Raiden).   Does anyone know where I can get that cape?  I'm one of those horrible completionist freaks and I need it badly!!

Is that one of the Uplay unlocks? They have Florentine Noble Attire, Altairs outfit, and the Armor of Altair from AC2.

I think it's the amazon pre-order armor.

Or this:
@Slaker117 said:

" I think it's the amazon pre-order armor. "

Well these are the known capes: 
 
Auditore Cape - Repair everything to get 100% on Rebuilding Rome  
Borgia Cape - Collect the 100 Borgia Flags  
Medici Cape - Play Assassin's Creed: Project Legacy (a Facebook game) and get to Level 30 / you must link your gamer profile to your Facebook page  
Venetian Cape - Play Assassin's Creed: Project Legacy (a Facebook game) and get to Level 30 / you must link your gamer profile to your Facebook page     

Argh!  It must be the pre-order armor, cuz I've done everything else.