Batman Arkham City - Catwoman DLC - Sphinx Riddle 04/06/2016

Batman and Catwoman Story Completed on Normal and Newgame plus unlocked.<br />
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Catwoman DLC - Sphinx' Riddle 10G<br />
Complete all 40 of the Catwoman Riddler grid items.<br />
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You will Begin in the Steel Mills Cooling Tunnel-D, run forwarad, turn left and the trophy is under the Bridge.