In Assassin’s Creed: Revelations for the PC, PS3, and Xbox 360, there are several weapons that you can unlock in the game by completing certain challenges in challenge mode.
Here are the weapons you can unlock, and which challenges you need to complete to unlock them.
Altair’s Sword – Complete the Set 3 Assassin Challenges
Broadsword – Complete the Set 3 Mercenary Challenges
Ottoman Mace – Complete the Set 3 Thief Challenges
Romani Stiletto – Complete the Set 3 Romani Challenges
