Data Fragments: These glowing orbs are scattered throughout Constantinople. Collecting them unlocks Desmond's Journey sequences and reveals more of the game's lore. There are 100 in total. Masyaf Keys: These are crucial to the main story. Each key unlocks a memory of Altaïr. They are found by completing specific main missions and by solving the challenging 'Ishak Pasha's Memoir' puzzles.
