Go to a S.H.I.E.L.D. save zone and select "Change Team". Delete all selected characters by pressing Square. Once all of your team slots are empty, quickly press Left(2), Right(2), Up, Down, Up, Down, Start to unlock Daredevil. If you entered the code correctly, you will hear a sound. Note: This code may also be enabled at the main menu. Alternately, collect the five Daredevil action figures (one is found in each Act).