P10D: The Smelting Chamber

P10D: The Smelting Chamber

First comment - this is a tough room!

Seriously though this really is a significant challenge, as the thugs are spreading proximity mines AND some are equipped with infrared goggles or night vision or whatever they are.  If you have the Heat Signature Conceal upgrade for the Batsuit as long as you remain completely still they should not be able to detect you, so really what this comes down to is patience.

Mixed in among the thugs down there is a Greenie, and as it is always a great idea to interrogate them, well, save him for last why don't you?

The biggest problem with this level is that the thugs make themselves vulnerable often, but they do it while near mines and, if you forget about the mines you end up getting seriously FUBAR'd -- and since the basic strategy for this level takes a lot of time making that sort of mistake means having to start from scratch -- so don't do that?  Fortunately this plays out like that old Chinese Proverb -- something about waiting by the river and watching your enemies float by?

After you finally take out all of the orange thugs and then interrogate the Greenie -- you DID interrogate the Greenie, right?  Anyway, after you interrogate him you get the timer update from Strange, and Joker might mention how disappointed he is with his men.  Note that interrogating the Greenie here has the immediate effect of revealing additional Riddler's Secrets locations inside the Smelting Chamber, the Assembly Line Building, and the Loading Bay.

Clearing the Smelting Chamber

At this point you have a find predicament since you cannot risk going down to the ground level due to all of the mines.  If you look on the map you will note the door you entered the Smelting Chamber from is near the center of the west wall more towards the north, and there are two doors in the east wall, above the center but more towards the north as well...

Closer examination of these doors reveals that the one that is more to the north is blocked by a steel gate but it also has a motor attached to it.  The one to the south is also on the second level but is set deeper into a hallway so you cannot tell from your perch above how safe or dangerous it may actually be to approach.   Being one of those types who believes that the devil you know is preferable to the one you don't (yes, I attended Catholic School) I went with the northern-most door, since I could see it from the perch across from it as well as open the gate using the REC from there as well...

You should be warned that use of the REC on the motor that raises the security gate that covers the doors is only temporary.  Targeting the motor with the REC has the effect of applying a charge to the motor, which is why it raises the gate, but once the charge wears off the weight of the gate -- combined with gravity -- causes the gate to fall back into its closed position, thus blocking access to the doors -- or in the case of the inner doors, the opening (since the doors here are locked open).  This is functioning as intended and is not an error.

-- Exiting the Smelting Chamber --

From the nearest Perch to the exit doors (once you have incap'd all of the enemy units) access can safely be obtained by targeting the motor above the closed gate with the REC from the perch and raising the gate, and then gliding through the opening that raising the gate created.  This approach is safe even if the enemy has mined the second-level catwalks. Inside the narrow hallway that connects the first gate with the second gate as another motor above the second gate that, when the REC is appl;ied to it, reveals a set of double doors that give access to the northern-most point in the western half of the Assembly Line Building.

Once you have arrived here, simply target the second motor with your REC and raise the gate then open the doors and pass through.