In Assassin’s Creed: Brotherhood for the PS3, Xbox 360, and PC, there are several different things you can unlock by leveling up the different guilds in the game.
Here is a list of the guild rewards in the game, and how to unlock them. Once they’re unlocked, look for them in Ezio’s Hideout.
Assassin’s Guild Crest – Complete all Assassin’s Guild challenges
Bartolomeo’s Axe – Level up each guild to level three
Courtesans Guild Crest – Level up each guild to level two
La Volpe’s Bite – Level up each guild to level three
Maria’s Dagger – Level up each guild to level three
Mercenaries Guild Crest – Level up each guild to level two
Sword of Altair – Complete all Assassin’s Guild challenges
Thieves Guild Crest – Level up each guild to level two