Item description:

You must resign the save files for them to work.
The PARAM.SFO has been removed from some save files for account safety, you'll have to use/create your own.
(i.e. using Bruteforce)

Load the savedata and press Continue Story.
"Counter-intelligence" & "Enigma Unravelled" - Collect the last Extortion file from the Bowery Comms Tower.
"First Riddler Trophy" - Go to Riddler's hideout, destroy his machine and unlock his door. Go through the door, across the gap, blow down the wall, and collect the Riddler trophy.