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On the hidden lab level (the one where you first encounter an explosive crate), I've got to the door on the upper level, but it doesn't open!?! What did I miss?

I'm talking about this level. As far as I can tell, I didn't miss anything from the walkthrough so I don't know why it won't open.

Nevermind, now I see it. You have to activate the screen (with the hand print) on the computer to open the door. I'd assumed it was just background decoration.
Post edited May 10, 2015 by wjousts