File Name: Batman Arkham City - Catwoman DLC - Sphinx Riddle File Submitter: EyesOnlyFile Submitted: 26 Mar 2013 File Category: Xbox360 Load and Pop Saves Batman and Catwoman Story Completed on Normal and Newgame plus unlocked. Catwoman DLC - Sphinx' Riddle 10G Complete all 40 of the Catwoman Riddler grid items. You will Begin in the Steel Mills Cooling Tunnel-D, run forwarad, turn left and the trophy is under the Bridge. Click here to download this file