Unlock the following costumes by performing the corresponding tasks:

COSTUME - HOW TO UNLOCK
Altair's Grandmaster Robes (Old Eagle) - Get 100% Sync in DNA Sequence 08.
Desmond Miles outfit - Find 30 fragments and complete all the Desmond memory sequences.
Master Assassin Robes - Complete the Assassins Guide challenges and become a True Master assassin.
Ishak Pasha Armor - Find all 10 Ishak Pasha Memoir Pages and complete the Hagia Sophia challenge level.