I have gotten 421 riddles up until now(including Catwoman's)without use of a guide or video showing me how, but I can't even find this one. It's the last one I need in the Steel Mill and it's down in the basement level, some where near the elevator. I've gotten the one where you have to break the penguins and the one behind the wall, but I can't find this one any where.
Can anyone help? The trophy icon is in the same room the elevator is in. But I've looked every where for it, top to bottom. It's probably something really obvious.
Stand outside the elevator on the bottom floor, and use the REC to send the elevator up. I can't remember this one too clearly, but I think you send up the right elevator. There should be a weak wall underneath. Blow that up, then snoop around down there.
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