Apparently, at the bottom of the room, there is a keypad where I have to enter a code to destroy the thing. But I see no keypad. I can see a pedestal, but with nothing on it. In fact, I may have destroyed the keypad when I blew up an above camera. I can't work out any other way to destroy it. Or would you recommend skipping the level?

You can't destroy the keypad so maybe there's something you didn't do. Did deal with Maggie already?

Maggie deaded.

Are you using a real copy of the game or is it pirated? If it's a real copy backup your saves file and reinstall the game. If it's pirated you're SOL.

Actually, I have destroyed many a keypad using the gep gun, so I figure I blew it up. But it doesn't matter anymore, as I just resumed a save back on Liberty island in the mj12 base. Now I just have to be arsed to get out of the catacombs in France. And no, it's not pirated.