Collect 8 music sheets and return them to Morusque to obtain this trophy.
The Slums:
Music Sheet 1/8 (0:00)
Music Sheet 2/8 (0:47)
Music Sheet 3/8 (1:16)
Music Sheet 4/8 (1:55)
Music Sheet 5/8 (2:33)
Music Sheet 6/8 (2:48)
Music Sheet 7/8 (3:15)
Music Sheet 8/8 (4:08)
Music Badge (5:36)