Collect the indicated amount of fragments to unlock the corresponding bonus.

"Capped" trophy or achievement: 100 fragments.
Animus Data fragments appear on Map: 50 fragments.
Desmond Memory Sequence 1: 5 fragments.
Desmond Memory Sequence 2: 10 fragments.
Desmond Memory Sequence 3: 15 fragments.
Desmond Memory Sequence 4: 20 fragments.
Desmond Memory Sequence 5: 30 fragments.
Ishak Pasha's Memoir Pages appear on map: 25 fragments.